معنی کلمه :‌ alertness

The quality of being alert or on the alert; briskness; nimbleness; activity.

1. A small plug. [Prov. End.] 2. (Naut.) A string of oakum used in calking. 3. (Med.) A compress, or small flat tent of lint, laid over a wound, ulcer, or the like, to exclude air, retain dressings, or absorb the matter discharged.