n.
1) to engage in, participate in, take part in an ~ (all students take part in extracurricular activities)
2) to resume one's activities
3) to break off, terminate an ~
4) to curb; paralyze ~ (business ~ was paralyzed)
5) bustling, constant, feverish, furious, uninterrupted ~
6) behind-the-scenes; business, economic; cultural; intellectual; physical; political; scientific; subversive; terrorist ~
7) extracurricular; recreational; social; union activities
8) to buzz, hum with ~
9) a burst of ~