(1):

(n.) The act of making notches; the act of cutting into small hollows.

(2):

(n.) The small hollow, or hollows, cut; a notch or notches.

(3):

(n.) A method of joining timbers, scantling, etc., by notching them, as at the ends, and overlapping or interlocking the notched portions.

(4):

(n.) A method of excavating, as in a bank, by a series of cuttings side by side. See also Gulleting.

(5):

(p. pr. & vb. n.) of Notch