sawtooth Syllabification: (saw·tooth)Pronunciation: /ˈsôˌto͞oTH/ (also sawtoothed or saw-toothed /-ˌto͞oTHt/)Definition of sawtooth adjective shaped like the teeth of a saw with alternate steep and gentle slopes. Physics (of a waveform) showing a slow linear rise and rapid linear fall or vice versa. sawtooth in other Oxford dictionaries Definition of sawtooth in the British & World English dictionary