Definitions

1. verb

to be active or moving; to be in a state of activity

“The town was astir at the news of the royal visit.”

2. adjective

full of activity or life; lively

“The city was astir with the sound of music and laughter.”

3. noun

a state of being active or in motion; a lively or energetic atmosphere

“The excitement was palpable, and the whole town was in an astir.”