noun
1.
a slowing or gradual decrease in activity
a slowdown in car sales this quarter
Synonyms: slack, slackening, slow-up
Related Word: decline, downtrend, downturn; drop, drop-off, falloff; inactivity, stagnation; freeze
Contrasted words: increase, rise, upswing, upturn; acceleration, quickening
Antonyms: speedup
2.
a deliberate slowing down by workers in the rate and quantity of production
air traffic snarled by a controllers' slowdown
Synonyms: ||ca' canny
Related Word: action; protest; slow-up; sit-down; strike, walkout; stoppage
Antonyms: speedup