We found 33 dictionaries that define the word lifetime:

General (25 matching dictionaries)

1. lifetime: Longman Dictionary of Contemporary English
2. lifetime: Merriam-Webster
3. lifetime: Oxford Learner's Dictionaries
4. lifetime: American Heritage Dictionary of the English Language
5. lifetime: Collins English Dictionary
6. lifetime: Vocabulary.com
7. LIfetime, Lifetime, lifetime: Wordnik
8. lifetime: Cambridge Advanced Learner's Dictionary
9. lifetime: Wiktionary
10. lifetime: Webster's New World College Dictionary, 4th Ed.
11. lifetime: The Wordsmyth English Dictionary-Thesaurus
12. lifetime: Infoplease Dictionary
13. Lifetime, lifetime: Dictionary.com
14. lifetime: Cambridge Essential American English Dictionary
15. Lifetime (British and Irish TV channel), Lifetime (Canada), Lifetime (Canadian TV channel), Lifetime (Klein album), Lifetime (Lifetime album), Lifetime (Real Life album), Lifetime (South East Asia), Lifetime (South East Asian TV channel), Lifetime (Southeast Asian TV channel), Lifetime (TV Network), Lifetime (TV channel), Lifetime (TV network), Lifetime (UK and Ireland), Lifetime (UK and Irish TV channel), Lifetime (band), Lifetime (disambiguation), Lifetime (network), Lifetime (physics), Lifetime (song), Lifetime: Wikipedia, the Free Encyclopedia
16. Lifetime: Online Plain Text English Dictionary
17. lifetime: Webster's Revised Unabridged, 1913 Edition
18. lifetime: Rhymezone
19. lifetime: AllWords.com Multi-Lingual Dictionary
20. lifetime: Webster's 1828 Dictionary
21. lifetime: FreeDictionary.org
22. lifetime: Mnemonic Dictionary
23. lifetime: TheFreeDictionary.com

Business (1 matching dictionary)

24. lifetime: Legal dictionary

Computing (2 matching dictionaries)

25. lifetime: Encyclopedia
26. Windows API Guide (No longer online)

Medicine (1 matching dictionary)

27. lifetime: Medical dictionary

Miscellaneous (1 matching dictionary)

28. lifetime: Idioms

Science (2 matching dictionaries)

29. Lifetime: Eric Weisstein's World of Physics
30. Lifetime: Extragalactic Astronomy

Tech (1 matching dictionary)

31. lifetime: Electronics

(Note: See lifetimes as well.)

Definitions from Wiktionary ( ) ▸ noun:  The duration of the life of someone or something. ▸ noun:  (informal, hyperbolic) A long period of time. Similar: lifespan, life, lifelong, year, decade, experience, time, lasting, longevity, forever, more... Opposite: death, transient, temporary, fleeting, momentary Types: human lifetime, cat's lifetime, dog's lifetime, hamster's lifetime, gerbil's lifetime, snake's lifetime, more... Phrases: lifetime employment, lifetime prevalence, lifetime risk, lifetime achievement, lifetime value, more... Adjectives: own, whole, entire, long, short, average, single, mean, human, radiative, finite Colors:     gold,     silver,     bronze,     emerald,     sapphire, more... ▸ Words similar to lifetime ▸ Usage examples for lifetime ▸ Idioms related to lifetime ▸ Wikipedia articles (New!) ▸ Popular adjectives describing lifetime ▸ Words that often appear near lifetime ▸ Rhymes of lifetime ▸ Invented words related to lifetime