Dictionary and Thesaurus

Definition of Alert

• (a.) Watchful; vigilant; active in vigilance.
• (a.) Brisk; nimble; moving with celerity.
• (n.) An alarm from a real or threatened attack; a sudden attack; also, a bugle sound to give warning.

Synonyms of Alert

• Qui Vive
• Alerting
• Alarm
• Warning Signal
• Alarum
• Alarm
• Watchful
• Brisk
• Lively
• Merry
• Rattling
• Snappy
• Spanking
• Zippy
• Alive
• Awake

Antonyms of Alert

• Unalert

Homophones of Alert