(to be) on the alert
1On the alert — Alert A*lert , n. (Mil.) An alarm from a real or threatened attack; a sudden attack; also, a bugle sound to give warning. We have had an alert. Farrow. [1913 Webster] {On the alert}, on the lookout or watch against attack or danger; ready to act …
2on the alert — phrasal : on the lookout for or watch against attack or danger : ready to act * * * on the alert phrase paying attention to what is happening and ready to react quickly if necessary Police warned residents to be on the alert for bogus salesmen.… …
3on the alert — {adj. phr.} Alert; watchful; careful. * /Campers must be on the alert for poison ivy and poison oak./ * /Drivers must be on the alert for traffic signals./ Compare: ON ONE S TOES …
4on the alert — {adj. phr.} Alert; watchful; careful. * /Campers must be on the alert for poison ivy and poison oak./ * /Drivers must be on the alert for traffic signals./ Compare: ON ONE S TOES …
5on\ the\ alert — adj. phr. Alert; watchful; careful. Campers must be on the alert for poison ivy and poison oak. Drivers must be on the alert for traffic signals. Compare: on one s toes …
6upon the alert — ▪ On the watch ▪ Wakefully attentive ● alert …
7on the alert — adjective Very attentive, or vigilant Wild animals have to be constantly on the alert for predators …
8be on the alert — index beware, patrol Burton s Legal Thesaurus. William C. Burton. 2006 …
9on the alert — index careful Burton s Legal Thesaurus. William C. Burton. 2006 …
10on the alert — начеку, настороже They must be constantly on the alert for enemy рlanes …
