Capable of being declined; admitting of declension or inflection; as, declinable parts of speech.
1. Of a sour temper; sullen and austere; ill-humored; severe. "A morose and affected taciturnity." I. Watts. 2. Lascivious; brooding over evil thoughts. [Obs.] Syn. -- Sullen; gruff; severe; austere; gloomy; crabbed; crusty; churlish; surly; ill-humored.