de ‧ press ‧ ant /dɪˈpres ə nt/ BrE AmE noun [countable]
[ Word Family: adjective : ↑ depressed , ↑ depressing , ↑ depressant , ↑ depressive ; noun : ↑ depression , ↑ depressant , ↑ depressive ; verb : ↑ depress ; adverb : ↑ depressingly ]
a substance or drug that makes your body processes slower and makes you feel very relaxed or sleepy ⇨ stimulant
—depressant adjective