1. a device that measures a specific period of time and signals when that time has passed
2. a person who measures and records time, especially in sports competitions
3. a mechanism in a device that controls when something happens automatically
Usage: technical

Examples

• Set the kitchen timer for twenty minutes.
• The bomb had a timer that would detonate it in one hour.
• She works as a timer at the local swim meets.
• The sprinkler system has an automatic timer.
• My phone has a built-in timer function.
• The timer on the washing machine is broken.
• He used a timer to track his study sessions.