decongestant

adjective

1. of or relating to a substance that relieves mucus congestion of the upper respiratory tract.

noun

2. any such substance.

adjective

1. relieving congestion, esp nasal congestion

noun

2. a decongestant drug

n.

1950, from de- + congestant (see congest).

n.

1. A medication or treatment that breaks up congestion, as that of the sinuses, by reducing swelling.

adj.

1. Capable of relieving congestion.

1. A medication that reduces congestion of the nose or sinuses, usually by causing vasoconstriction.