egressive adjective 3noun 1forms 1 adjective3 •Going or directed outward. •Uttered by pushing air out through the mouth or nose. •descriptive of a place or channel through which something such as water or lava leaves an area.This ancient wash was an egressive channel that once drained a lake. noun1 •A speech sound in which the air stream is created by pushing air out through the mouth or nose. formsegressives