The first letter of a word or a name. / In plural, the first letter of each word of a person's full name considered as a unit.

(transitive) To sign one's initial(s), as an abbreviated signature.

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

existing or occurring at the beginning

Able to be initiated / (computing) Able to be set to an initial value or state; initializable

plural of initialization

plural of initializer

One who, or that which, initializes. / (programming) A routine that prepares something for use.