Entry 1 sense Webster, 1913 Dumps /(dŭmps)/ · IPA /dʌmps/ 01 n. pl. a gloomy mental state; same as 2nd dump{1}; -- used mostly in the phrase “in the dumps”. 1. a gloomy mental state; same as 2nd dump{1}; -- used mostly in the phrase “in the dumps”. See: dump{1}