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inaudible not capable of being heard; not audible.
inaugural of or associated with an inauguration. [4 definitions]
inaugurate to install in office with a formal ceremony. [3 definitions]
inauguration a formal beginning or start.
Inauguration Day the day the President of the United States is inaugurated, January 20 following the presidential election.
inauspicious showing little or no promise of success; unfavorable.
inauthentic not authentic.
in back behind.
inboard located inside the main body of a vessel or aircraft. (Cf. outboard.) [4 definitions]
inborn present at birth; inherited.
inbound moving in an inward direction; inward bound.
inbred deep-seated as a result of early training, experience, or inheritance. [2 definitions]
inbreed to produce as offspring of closely related individuals. [3 definitions]
in bulk not wrapped or packaged; loose.
inc. abbreviation of "incorporated," in law, having been formed into a corporation.
Inca a member of one of the native peoples that ruled Peru before the Spanish conquest in the sixteenth century.
incalculable not capable of being calculated or measured; too great or large to be calculated. [2 definitions]
incandesce to glow or cause to glow as a result of heat.
incandescence the giving off of light by an object or substance heated to a high degree. [2 definitions]
incandescent giving off light as a result of heating. [3 definitions]
incandescent lamp a lamp or light bulb in which a filament is made to glow by electric current.