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Definition of undertake

undertake

/ˌʌndərˈteɪk/
un · der · take

Adjective:undertakable
•
Past Simple:undertook
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Past Participle:undertaken
•
Present Participle:undertaking
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undertake Lexical Profile

undertake Game Scores & Validity

• verb

1

To commit oneself to and begin a significant, difficult, or lengthy enterprise, task, or responsibility.

Example

"The university decided to undertake a comprehensive study of urban air quality over the next five years."


2

To promise, guarantee, or pledge formally to do a particular thing.

Example

"Under the terms of the settlement, the company undertook to reimburse all affected customers within thirty days."


3

British To pass or catch up with another vehicle while driving on the inside lane (the left lane in countries that drive on the left).

Example

"The impatient driver was fined by the motorway police after attempting to undertake a slow-moving lorry in the left lane."

Synonyms
View all synonyms for undertake
Antonyms
View all antonyms for undertake

Word Nuance & Usage

In British traffic usage, 'undertake' means to pass a vehicle on the inside (nearside) lane, contrasting with 'overtake' (passing on the outside lane).

• Rhymes for undertake

Word Origin & Etymology

From Middle English undertaken, formed from under- (in the sense of 'among' or 'between') and taken ('to take'), patterned after Old English underniman ('to receive or take upon oneself').

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Undertake. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/undertake
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