RhymeZone: infill definitions

Definitions of infill:

verb: To fill in a space, hole or gap.
verb: (urban studies) To rededicate land in an urban environment to new construction.
noun: That which fills in a space, hole or gap.
noun: (cosmetics) The redecoration of a fingernail or toenail after it has grown, to prevent an unsightly gap.
noun: Alternative form of infil (“infiltration”).

(Definitions from Wiktionary)