Search Dictionary
Definition of lifetime

lifetime

/ˈlaɪfˌtaɪm/
life · time
Plural:lifetimes
JUMP TO:

lifetime Lexical Profile

lifetime Game Scores & Validity

• noun

1

The duration of a person's life or existence.

Example

"She accomplished more in a single lifetime than most people could ever imagine."

2

The period of time during which a machine, organization, or phenomenon remains functional or in existence.

Example

"Regular maintenance will significantly extend the operational lifetime of the engine."

3

A very long period of time (used hyperbolically).

Example

"Waiting for the test results felt like an absolute lifetime."

Synonyms
View all synonyms for lifetime
Antonyms
View all antonyms for lifetime

• adjective

1

Lasting or valid for the entire duration of a person's life or the existence of an object.

Example

"The company offers a lifetime warranty on all of its stainless steel cookware."

Synonyms
View all synonyms for lifetime
Antonyms
View all antonyms for lifetime

• Nearby Words

lifesaving
lifespan
lifestyle
lifetime
lifework
liffey
liffey falls

Word Origin & Etymology

Formed in Middle English as a compound of 'life' (from Old English 'lif') and 'time' (from Old English 'tima').

Cite this Entry

Wordmom. (2026). Definition of Lifetime. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/lifetime
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.