We found 22 dictionaries that define the word attention span:

General (19 matching dictionaries)

1. attention span: Merriam-Webster
2. attention span: Oxford Learner's Dictionaries
3. attention span: American Heritage Dictionary of the English Language
4. attention span: Collins English Dictionary
5. attention span: Vocabulary.com
6. attention-span: Wordnik
7. attention span: Cambridge Advanced Learner's Dictionary
8. attention span: Wiktionary
9. attention span: Infoplease Dictionary
10. attention span: Dictionary.com
11. Attention span: Wikipedia, the Free Encyclopedia
12. attention span: Rhymezone
13. attention span: FreeDictionary.org
14. attention span: Mnemonic Dictionary
15. attention span: TheFreeDictionary.com
16. attention span: Longman Dictionary of Contemporary English
17. attention span: Merriam-Webster

Computing (1 matching dictionary)

18. attention span: Encyclopedia

Medicine (1 matching dictionary)

19. Attention Span: Brain Injury

Slang (1 matching dictionary)

20. attention span: Urban Dictionary

(Note: See attention_spans as well.)

Definitions from Wiktionary (attention span) ▸ noun:  The length of time, or span that one can pay attention, or concentrate on one topic without becoming distracted. Similar: memory span, focus, attention, interest, acies, brainspace, wakespan, listenership, watchtime, screen time, more... Phrases: Short Attention Span Theater, short attention span, having a short attention span, person with a short attention span, more... Adjectives: time tested, yearslong, life long, monthslong, hourslong, decadelong, longrunning, shortlived, lived, longterm, long-term ▸ Words similar to attention span ▸ Usage examples for attention span ▸ Idioms related to attention span ▸ Wikipedia articles (New!) ▸ Words that often appear near attention span ▸ Rhymes of attention span ▸ Invented words related to attention span