RhymeZone: montelukast definitions

Definitions of montelukast:

noun: (pharmacology) A leukotriene antagonist (trademark Singulair) used orally in the form of its sodium salt C₃₅H₃₅ClNNaO₃S to treat asthma or to relieve the symptoms of seasonal allergic rhinitis.

(Definitions from Wiktionary)