An inseparable prefix, or particle, meaning not, non-, un- as, inactive, incapable, inapt. In- regularly becomes il- before l, ir- before r, and im- before a labial.

A prefix from Eng. prep. in, also from Lat. prep. in, meaning in, into, on, among; as, inbred, inborn, inroad; incline, inject, intrude. In words from the Latin, in- regularly becomes il- before l, ir- before r, and im- before a labial; as, illusion, irruption, imblue, immigrate, impart. In- is sometimes used with an simple intensive force.

An old game played with four dice. In signified a doublet, or two dice alike; in-and-in, either two doubles, or the four dice alike.

Going; entering, as upon an office or a possession; as, an in-going tenant.

The act of going in; entrance.