1. excessively or overly alert; more watchful or vigilant than necessary
Usage: often used to describe a state of heightened awareness that may be counterproductive or anxiety-driven

Examples

• After the incident, she remained overalert to every sound in the house.
• The overalert security guard checked the same door five times in an hour.
• His overalert state made it difficult for him to sleep or relax.
• Parents can become overalert to their children's safety, limiting their independence.
• The dog seemed overalert, jumping at every shadow and noise.