Definition of lifetime
1a : the duration of the existence of a living being (such as a person or an animal) or a thing (such as a star or a subatomic particle)b : life 12
2 : an amount accumulated or experienced in a lifetime a lifetime of regrets
Explore M-W
Examples of lifetime in a Sentence
a lifetime spent traveling the world
It would have taken me a lifetime to read all those books.
Childhood seems a lifetime ago now!
a chemical with a lifetime of only a few minutes
the lifetime of a planet
13th Century
First Known Use of lifetime
13th century
lifetime
Definition of lifetime
1 : lifelong
2 : of long duration or continuance lifetime legislation
3 : measured or achieved over the span of a career a baseball player's lifetime batting average
1834
First Known Use of lifetime
1834
LIFETIME Defined for English Language Learners
lifetime
playDefinition of lifetime for English Language Learners
-
: the time during which a person is alive
-
: a very long time
-
: the time during which something lasts or is useful
LIFETIME Defined for Kids
Learn More about lifetime
-
See words that rhyme with lifetime Thesaurus: All synonyms and antonyms for lifetime Spanish Central: Translation of lifetime Nglish: Translation of lifetime for Spanish speakers Britannica English: Translation of lifetime for Arabic speakers
Seen and Heard
What made you want to look up lifetime? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!