indenture

1 a sunken area forming a separate space the dropped hammer left an indenture in the floor Synonyms cavity, concavity, dent, depression, dint, hollow, indentation, hole, pit, recessRelated Words burrow, cave, cavern, ditch, excavation, furrow, groove, gutter, trench, trough; basin, bowl, valley; alcove, cleft, niche, nook, opening, recess, socket; alveolus, dimple, gouge, impression, imprint, notch, pocket; borehole, chuckhole, crater, posthole, pothole, sinkhole, wallow, water hole, well; abyss, chasm, gulf, vacuity, vacuum, voidNear Antonyms hill, mound, rise; bump, bunch, hump, lump, pimple, swell, swelling, tumorAntonyms bulge, camber, convexity, jut, projection, protrusion, protuberance

2 a V-shaped cut usually on an edge or a surface made a small indenture to mark the spot where the plank was to be sawed Synonyms chip, hack, indent, indentation, notch, kerf, nickRelated Words joggle, nock, punch, snip; groove, score, undercut; slit, slot