/ ˈdaʊnswɪŋ; NAmE / noun [ usually sing. ]
1.
downswing (in sth) a situation in which sth gets worse or decreases over a period of time :
the current downswing in the airline industry
He is on a career downswing.
OPP upswing
2.
(in golf ) the downward movement of a club when a player is about to hit the ball