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We found 51 dictionaries with English definitions that include the word alert:
Click on the first link on a line below to go directly to a page where "alert" is defined.

General (31 matching dictionaries)

1. alert: Merriam-Webster.com [home, info]
2. alert: Oxford Learner's Dictionaries [home, info]
3. alert: American Heritage Dictionary of the English Language [home, info]
4. alert: Collins English Dictionary [home, info]
5. alert: Vocabulary.com [home, info]
6. alert, alert, alert: Macmillan Dictionary [home, info]
7. Alert, alert: Wordnik [home, info]
8. alert: Cambridge Advanced Learner's Dictionary [home, info]
9. Alert, alert: Wiktionary [home, info]
10. alert: Webster's New World College Dictionary, 4th Ed. [home, info]
11. alert: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. alert: Infoplease Dictionary [home, info]
13. ALERT: Dictionary.com [home, info]
14. alert: Online Etymology Dictionary [home, info]
15. alert: UltraLingua English Dictionary [home, info]
16. alert: Cambridge Dictionary of American English [home, info]
17. alert: Cambridge International Dictionary of Idioms [home, info]
18. ALERT (medical facility), Alert(), Alert (gum), Alert (interbank network), Alert: Wikipedia, the Free Encyclopedia [home, info]
19. Alert: Online Plain Text English Dictionary [home, info]
20. alert: Webster's Revised Unabridged, 1913 Edition [home, info]
21. alert: Rhymezone [home, info]
22. alert, alert: AllWords.com Multi-Lingual Dictionary [home, info]
23. alert: Webster's 1828 Dictionary [home, info]
24. Alert: Dictionary of Phrase and Fable (1898) [home, info]
25. alert: Free Dictionary [home, info]
26. alert: Mnemonic Dictionary [home, info]
27. alert: WordNet 1.7 Vocabulary Helper [home, info]
28. alert: LookWAYup Translating Dictionary/Thesaurus [home, info]
29. alert: Dictionary/thesaurus [home, info]

Business (4 matching dictionaries)

30. Alert: MoneyGlossary.com [home, info]
31. alert: INVESTORWORDS [home, info]
32. alert: Legal dictionary [home, info]
33. alert: BusinessDictionary.com [home, info]

Computing (4 matching dictionaries)

34. alert: Free On-line Dictionary of Computing [home, info]
35. alert: CCI Computer [home, info]
36. alert: I T Glossary [home, info]
37. alert: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

38. alert: online medical dictionary [home, info]
39. alert: Medical dictionary [home, info]
40. Alert: Brain Injury [home, info]

Miscellaneous (4 matching dictionaries)

41. ALERT: Navajo Code Talkers' Dictionary [home, info]
42. ALERT: Acronym Finder [home, info]
43. ALERT: AbbreviationZ [home, info]
44. alert: Idioms [home, info]

Slang (1 matching dictionary)

45. alert: Urban Dictionary [home, info]

Sports (1 matching dictionary)

46. Alert: Fifthchair Bridge [home, info]

Tech (3 matching dictionaries)

47. Alert: AUTOMOTIVE TERMS [home, info]
48. ALERT: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]
49. ALERT: National Weather Service Glossary [home, info]

(Note: See alerts for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (alert) ▸ noun:  a warning serves to make you more alert to danger ▸ noun:  condition of heightened watchfulness or preparation for action ("Bombers were put on alert during the crisis") ▸ noun:  an automatic signal (usually a sound) warning of danger ▸ verb:  warn or arouse to a sense of danger or call to a state of preparedness ("We alerted the new neighbors to the high rate of burglaries") ▸ adjective:  mentally responsive ("An alert mind") ▸ adjective:  very attentive or observant ("An alert and responsive baby is a joy") ▸ adjective:  (usually followed by `to') showing acute awareness; mentally perceptive ("Alert to the problems") ▸ adjective:  not unconscious; especially having become conscious ("The patient is now awake and alert") ▸ name:  A surname (very rare: popularity rank in the U.S.: #66111) ▸ Also see alerts ▸ Word origin ▸ Words similar to alert ▸ Usage examples for alert ▸ Idioms related to alert (New!) ▸ Popular adjectives describing alert ▸ Popular nouns described by alert ▸ Words that often appear near alert ▸ Rhymes of alert ▸ Invented words related to alert