undertaking

noun

un·​der·​tak·​ing ˈən-dər-ˌtā-kiŋ 

ˌən-dər-ˈtā-;

 sense 1b is  only ˈən-dər-ˌtā-

1

a

: the act of one who undertakes or engages in a project or business

b

: the business of an undertaker

2

: something undertaken : enterprise

3

: pledge, guarantee

Examples of undertaking in a Sentence

The restoration of the old theater is a huge undertaking.

He advised us against such a risky undertaking.

Recent Examples on the Web

The scope and size of the undertaking was always subject to change as work continued, according to a White House official. —Marco Hernandez, New York Times, 24 Oct. 2025

Some have also characterized the undertaking — which is taking place amid the government shutdown — as a garish expression of personal vanity. —Brendan Rascius, Miami Herald, 23 Oct. 2025

This was an undertaking that almost no one was asking for. —Philip Elliott, Time, 23 Oct. 2025

This responsibility transforms a standard account into a high-touch, high-cost compliance undertaking. —Peter Su, Rolling Stone, 20 Oct. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1a

Phrases Containing undertaking

• give an undertaking

Rhymes for undertaking

• merrymaking
• moneymaking
• overtaking
• papermaking
• aching
• baking
• braking
• breaking
• caking
• faking
• flaking
• making

Kids Definition

undertaking

noun

un·​der·​tak·​ing ˈən-dər-ˌtā-kiŋ 

ˌən-dər-ˈtā-kiŋ;

 sense 1b is  ˈən-dər-ˌtā-kiŋ,

 only 

1

a

: the act of a person who undertakes something

b

: the business of an undertaker

2

: something undertaken

Legal Definition

undertaking

noun

un·​der·​tak·​ing

1

: a promise or pledge especially required by law

2

: something (as cash or a written promise) deposited or given as security especially in a court

Note: Undertakings are often required of one party during property actions (as for attachment) in order to compensate the other party should the court's action (as in attaching the property) be found unjustified later.