(military, chiefly historical) A step or platform dug into the front side of a military trench - allowing soldiers to stand on it in order to fire over the parapet.

(mathematics) A function from the real line to a finite subset of the real line.

(music) An interval equal to two half steps; a major second.

(music, US) An interval of which there are seven in a fifth or twelve in an octave, consisting of two tones whose frequency ratio is about 1.059 or 18/17.

A sudden, discontinuous change.

A misstep; a stumble. / (figuratively) An erroneous action or decision.

plural of stepping stone

plural of step change

present participle of goose-step

simple past tense and past participle of goose-step