Examples of “alert” in a Sentence

adj Watchful and paying close attention; ready to notice or react quickly.

• Stay alert while driving at night.
• The guard dog remained alert to every sound outside.
• Even after a long shift, the lifeguard stayed alert and scanned the water.

noun A warning or notification about something that needs attention.

• She got a weather alert on her phone about the incoming storm.
• The bank sent an alert when someone tried to use my card abroad.
• A flood alert was issued for the villages along the river.

verb To warn someone about something.

• A neighbor alerted the fire department to the smoke.
• Please alert the teacher if you see anyone struggling in the playground.
• The smoke alarm alerted us to the problem before the flames spread.