An abbreviation of a person's name, constructed by taking the initial letters of first, last, and sometimes middle name(s). See monogram

Third-person singular simple present indicative form of initial

plural of initiative

One who initiates. / (chemistry) A substance that initiates a chain reaction or polymerization.

plural of initiator

plural of initiate

Third-person singular simple present indicative form of initiate

simple past tense and past participle of initial

present participle of initial

The act of adding one's initials to a document rather than signing