to decide to do something: to do something on purpose / to perform a maneuver, to carry out a tactical action / to decide on an opinion: to believe in an opinion firmly

jazz combo / combination

(music) jazz

a performance (of music); a recital

to play (an instrument) / to perform (a piece of music)

(graphical user interface) combo box

swing jazz

(chiefly women's speech) first person singular pronoun: I, me

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness