Noun

• S: (n) decrease (decrease%1:11:00::), lessening (lessening%1:11:00::), drop-off (drop-off%1:11:00::) (a change downward) "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales"
• S: (n) decrease (decrease%1:22:00::), decrement (decrement%1:22:00::) (a process of becoming smaller or shorter)
• S: (n) decrease (decrease%1:07:00::), decrement (decrement%1:07:00::) (the amount by which something decreases)
• S: (n) decrease (decrease%1:04:00::), diminution (diminution%1:04:00::), reduction (reduction%1:04:00::), step-down (step-down%1:04:00::) (the act of decreasing or reducing something)

Verb

• S: (v) decrease (decrease%2:30:00::), diminish (diminish%2:30:00::), lessen (lessen%2:30:00::), fall (fall%2:30:06::) (decrease in size, extent, or range) "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
• S: (v) decrease (decrease%2:30:01::), lessen (lessen%2:30:02::), minify (minify%2:30:00::) (make smaller) "He decreased his staff"