active

noun1 of 2

moving around a lot or doing many things

• “It's critical to keep your mind active as you age.”Tatoeba
• “Old as he is, he is very healthy and active.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

adjective2 of 2

Quick in physical movement; of an agile and vigorous body; nimble.