What does undertaking mean?
Undertaking is a formal word with two closely related uses. As a noun, it refers to a task, project, or enterprise that someone takes on, often one that is large, demanding, or important: the construction of the bridge was a major undertaking. It can also mean a formal promise or commitment to perform an action. As a verb, undertaking means agreeing or promising to do something, as in "the organisation undertook to publish the findings," or beginning and carrying out a responsibility or activity. The noun is widely used in formal and professional contexts, while the verb is especially familiar in British English and remains standard in American English. Although it can sound formal or old-fashioned in everyday conversation, it is useful when the scale or seriousness of a commitment matters. Its meaning consistently centres on taking responsibility for something.
An enterprise, task, or project that is undertaken; a commitment or enterprise involving responsibility for an activity.
"The move to a new operating system proved to be a considerable undertaking."
Often used for work that is unusually large, difficult, or significant. It can also denote a formal commitment, such as a written undertaking.
To agree or promise to do something, or to begin and carry out an activity, task, or responsibility.
"The charity undertook to provide emergency accommodation for families displaced by the fire."
The construction "undertake to" is particularly associated with formal commitments. The verb is standard in British and American English but is less common in casual speech than simpler alternatives such as agree to or carry out.
Used when referring to multiple enterprises, projects, tasks, or formal commitments.
"The two major infrastructure undertakings are expected to take several years to complete."
Undertaking began as a promise to take something on yourself, so its modern sense of both an enterprise and a commitment is built into the word.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does undertaking come from?
Undertaking was formed within the Middle English verb under-taken, which developed from Old English undergeþan, meaning to take on oneself or undertake. The prefix under- here contributed the sense of taking a matter upon oneself, while the ending -ing produced the gerund form later used as a noun. The related forms undertake and undertaker preserve the same Germanic base and semantic history.
Related word forms
How undertaking is actually used
The noun is formal and often suggests a substantial or difficult enterprise, especially in phrases such as "a major undertaking." As a verb, "undertake" is common in formal British usage and is also used in American English, particularly with the construction "undertake to do" something.
Easily confused with undertaking
An undertaking is an activity or commitment that someone takes on, whereas undergoing means experiencing a process or treatment.