Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

lifetime

play
noun life·time \ˈlīf-ˌtīm\

Simple Definition of lifetime

  • : the time during which a person is alive

  • : a very long time

  • : the time during which something lasts or is useful

Full Definition of lifetime

  1. 1 a :  the duration of the existence of a living being (as a person or an animal) or a thing (as a star or a subatomic particle) b :  life 12

  2. 2 :  an amount accumulated or experienced in a lifetime <a lifetime of regrets>

Examples of lifetime

  1. a lifetime spent traveling the world

  2. It would have taken me a lifetime to read all those books.

  3. Childhood seems a lifetime ago now!

  4. a chemical with a lifetime of only a few minutes

  5. the lifetime of a planet



13th Century

First Known Use of lifetime

13th century


2

lifetime

adjective life·time

Definition of lifetime

  1. 1 :  lifelong

  2. 2 :  of long duration or continuance <lifetime legislation>

  3. 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 Kids

lifetime

play
noun life·time \ˈlīf-ˌtīm\

Definition of lifetime

  1. :  life 2





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).

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

16.96 pounds 2.2 pounds 196.5 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ