squelch / skwelch/ • v. [intr.] make a soft sucking sound such as that made by walking heavily through mud: bedraggled guests squelched across the lawn to seek shelter. ∎ [tr.] inf. forcefully silence or suppress: property developers tried to squelch public protest.• n. 1. a soft sucking sound made when pressure is applied to liquid or mud: the squelch of their feet.2. (also squelch circuit) Electr. a circuit that suppresses the output of a radio receiver if the signal strength falls below a certain level.DERIVATIVES: squelch·er n.squelch·y adj.