flask

noun

ˈflask 

ˈfläsk

: a container often somewhat narrowed toward the outlet and often fitted with a closure: such as

a

: a broad flattened necked vessel used especially to carry an alcoholic beverage on the person

b

British : thermos

Examples of flask in a Sentence

Recent Examples on the Web

Dern, an executive producer on the series, who also plays feminist activist Linda Shaw, had one person in mind for the role of Norma Dellacorte, the flask-toting matriarch who rules the area’s social scene. —Savannah Walsh, Vanity Fair, 7 Jan. 2026

Its running vest-style chest harness provides comfort, stability, and most importantly, easy-access pockets for snacks (or a soft flask for water). —The Editors, Outside, 31 Dec. 2025

This stunning stainless-steel flask keeps cocktails, whiskey, or wine perfectly chilled on the trail or by the fire. —Francesca Krempa, Travel + Leisure, 11 Dec. 2025

And in case of emergencies, a good ol' fashioned flask will more than do the trick. —Todd Plummer, Condé Nast Traveler, 8 Dec. 2025

Word History

Etymology

Middle French flasque powder flask, ultimately from Late Latin flascon-, flasco bottle, probably of Germanic origin; akin to Old High German flaska bottle

First Known Use

1549, in the meaning defined above

Phrases Containing flask

• Erlenmeyer flask
• Florence flask
• hip flask
• vacuum flask

Rhymes for flask

• ask
• bask
• basque
• cask
• casque
• mask
• masque
• pasch
• task
• subtask
• unmask

Kids Definition

flask

noun

ˈflask 

: a container shaped like a flattened bottle

Medical Definition

flask

1 of 2 noun

ˈflask 

: a container often somewhat narrowed toward the outlet and often fitted with a closure: as

a

: any of various usually blown-glass vessels used for technical purposes in a laboratory

b

: a metal container in which the materials used to form a dental restoration (as a denture) are processed

flask

2 of 2 transitive verb

: to place (a denture) in a flask for processing