1 of, at, or concerning the beginning
2 the first letter of a word, esp. a person's name
3 (Printing) a large sometimes highly decorated letter set at the beginning of a chapter or work
4 (Botany) a cell from which tissues and organs develop by division and differentiation; a meristematic cell
vb , -tials, -tialling, -tialled
(U.S.) , -tials, -tialing, -tialed
5 tr to sign with one's initials, esp. to indicate approval; endorse
(C16: from Latin initialis of the beginning, from initium beginning, literally: an entering upon, from inire to go in, from in-2 + ire to go)
initialer, initialler n
English Collins Dictionary - English Definition & Thesaurus
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"