Dampen \Damp"en\ (d[a^]mp"'n), v. t. [imp. & p. p. {dampened} (d[a^]mp"'nd); p. pr. & vb. n. {dampening}.] 1. To make damp or moist; to make slightly wet. [1913 Webster] 2. To depress; to check; to make dull; to lessen. [1913 Webster] In a way that considerably dampened our enthusiasm. --The Century. [1913 Webster]