adj.
1.very attentive or observant
2.mentally responsive
3.not unconscious
4.(usually followed by `to') showing acute awareness alert n.
1.condition of heightened watchfulness or preparation for action
2.a warning serves to make you more alert to danger
3.an automatic signal (usually a sound) warning of danger alert v.
1.warn or arouse to a sense of danger or call to a state of preparedness
Idiom of the Day
put in time
to spend time doing something
The man put in much time fixing up his house and now it looks very beautiful.