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Contemporary Canadian & From Scratch Cooking - Undefined, Hamilton, ON

Undefined

4.7 (861)
CAN$31 to CAN$50
Bistro
35 King William St, Hamilton, ON L8R 1A1

Make a reservation

2 people
9:00 PM
Booked 5 times today
Experiences are available.

About this restaurant

  • Great for creative cocktails
  • Good for special occasions
  • Innovative
UnDefined has been changing the way people think about dining out in Hamilton. Voted one of Hamilton's best all-around restaurants for 2021, 2022, 2023, we are making a big impact on King William Street. With an evolving, seasonal and whimsical approach, our passion is what drives us every day. We strive to push the limits, and for our team, it is just what we love to do. We cook from scratch because that is just the way it should be. We love to challenge the way we all think about dining out.

We believe that there is no reason to put yourself in a box when going out with friends, so we do not do that here. Whether it is a night out with friends, an intimate dinner for two, or just something extraordinary, We are not afraid to take the familiar and turn it into something memorable. If it tastes good, we will put it on a plate, in a glass, or whatever. Our mantra is as simple as eat, drink, and enjoy!

Dining areas

Additional information

  • Dining style
    Casual Elegant
  • Price
    CAN$31 to CAN$50
  • Cuisines
    Bistro, Farm-to-table, Cocktail Bar
  • Hours of operation
    Brunch Sat, Sun 10:00 am–3:00 pm Lunch Wed–Fri 11:30 am–4:00 pm Dinner Daily 4:00 pm–10:00 pm Bar Fri, Sat 10:00 pm–12:00 am
  • Phone number
  • Payment options
    AMEX, Mastercard, Visa
  • Dress code
    Business Casual
  • Neighborhood
    Hamilton
  • Cross street
    James Street North & King William
  • Parking details
    Street Parking
  • Public transit
    James Street North & King William
  • Additional
    Bar/Lounge, Beer, Chef's Table, Cocktails, Corkage Fee, Full Bar, Gender Neutral Restroom, Gluten-free Options, Happy Hour, Late Night, Non-Smoking, Patio/Outdoor Dining, Vegan, Weekend Brunch, Wine
Gift card

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Experiences

  • Brunch UnDefined!

    May 1, 2025 - Dec 31, 2025
    Join us for an UnDefined brunch Saturdays & Sundays. UnDefined is know for its ever evolving menus and unique additions. Indulge in some of our favorites as well as a seasonal a la carte offerings to brunch without definition. Reservations highly recommended - No additional costs - Menu offering is a la carte
    Brunch UnDefined! Photo

What 861 people are saying

Undefined reviews from people who’ve dined at this restaurant. Based on recent rating.

Overall ratings and reviews

Reviews can only be made by diners who have eaten at this restaurant

4.7
4.7 based on recent ratings
  • 4.7Food
  • 4.7Service
  • 4.6Ambience
  • 4.4Value

NoiseModerate

Loved For

  • Toronto / Ontario

    Bistro

  • Southern Ontario

    Innovative

  • Southern Ontario

    Great for creative cocktails

Review summary

AI-generated from verified diner reviews
Undefined offers an exceptional dining experience with "amazing food," "great service," and a lively atmosphere. Diners praise its "creative menu" and "mouthwatering" dishes like the scallop risotto and biscuits. The ambiance is both "fun" and "elevated," making it a "perfect spot" for any occasion. Highly recommended for brunch and dinner alike.
861 Reviews
  1. Aronno

    Toronto / Ontario1 review

    3.0

    Dined 4 days ago

    1. Overall 3
    2. Food 4
    3. Service 5
    4. Ambience 2
    Service was amazing and really quick. Food and drinks were great to look at and chowing down.

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  2. Jon VIP

    California Central Coast21 reviews

    5.0

    Dined on June 23, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Great unexpected fantastic experience at Undefined. We had great service, Great food and great ambient. Very cool place. The squid and the scallop risotto was amazing. Highly recommend!

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  3. David

    Toronto / Ontario1 review

    5.0

    Dined on June 20, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    The food, the service, and the atmosphere, are always excellent. It’s our go to place.

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  4. Debashis

    Toronto / Ontario2 reviews

    3.0

    Dined on June 15, 2025

    1. Overall 3
    2. Food 4
    3. Service 3
    4. Ambience 4
    Chicken biscuit benny was really good. Short staffed for busy Father’s Day so service suffered a little, but it was always with a smile. Recommend for brunch.

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  5. James

    New York City32 reviews

    5.0

    Dined on June 14, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Food and service were awesome. Hope I have the opportunity to dine there again.

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  6. Jason

    Toronto / Ontario1 review

    5.0

    Dined on June 14, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Everyone from the server to bartender, manager and chefs are top notch. Food and presentation were right on the mark. I would 100% recommend this place.

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  7. Jaimie VIP

    Toronto / Ontario10 reviews

    5.0

    Dined on June 8, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    We never have a bad experience- everything the kitchen does is mouthwatering and the cocktails are fun and well balanced.

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  8. jared

    Toronto / Ontario6 reviews

    5.0

    Dined on May 24, 2025

    1. Overall 5
    2. Food 5
    3. Service 4
    4. Ambience 5
    The biscuits are the BEST!! A must try for anyone!

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  9. ABIR

    Toronto / Ontario3 reviews

    5.0

    Dined on May 19, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    This is by far the best restaurant I have been lately the food was 10/10. Hana our server was amazing also ,professional and always there asking if we needed anything, with friendly smile . The atmosphere is beautiful the ambiance is amazing the food higher end that what we though. It’s honestly worth the try looking forward to going there again. By the way the food presentation was unreal also. Can’t say enough about this place. Price is very reasonable also had mention that. Thanks To my son for recommending this restaurant.

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  10. Marlene

    Toronto / Ontario1 review

    5.0

    Dined on May 17, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Delicious food! And great service. I would recommend this restaurant to any foodee

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FAQs

Undefined is rated 4.7 stars by 861 OpenTable diners.

Undefined does offer gift cards which you can purchase here.

Yes, you can generally book this restaurant by choosing the date, time and party size on OpenTable.

  1. Home
  2. Canada
  3. Toronto / Ontario
  4. Southern Ontario
  5. Hamilton

Make a reservation

2 people
9:00 PM
Booked 5 times today
Experiences are available.
Google Map for Undefined

35 King William St, Hamilton, ON L8R 1A1

Dining areas

Additional information

  • Cross street
    James Street North & King William
  • Neighborhood
    Hamilton
  • Hours of operation
    Brunch Sat, Sun 10:00 am–3:00 pm Lunch Wed–Fri 11:30 am–4:00 pm Dinner Daily 4:00 pm–10:00 pm Bar Fri, Sat 10:00 pm–12:00 am
  • Price
    CAN$31 to CAN$50
  • Cuisines
    Bistro, Farm-to-table, Cocktail Bar
  • Dining style
    Casual Elegant
  • Dress code
    Business Casual
  • Parking details
    Street Parking
  • Public transit
    James Street North & King William
  • Payment options
    AMEX, Mastercard, Visa
  • Additional
    Bar/Lounge, Beer, Chef's Table, Cocktails, Corkage Fee, Full Bar, Gender Neutral Restroom, Gluten-free Options, Happy Hour, Late Night, Non-Smoking, Patio/Outdoor Dining, Vegan, Weekend Brunch, Wine
Gift card

Gift card

Send gift cards instantly by email or print to present in person.

Send a gift card
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