Meaning of INITIAL in English

INITIAL

/ ɪˈnɪʃl; NAmE / adjective , noun , verb

■ adjective

[ only before noun ] happening at the beginning; first :

an initial payment of £60 and ten instalments of £25

in the initial stages (= at the beginning) of the campaign

My initial reaction was to decline the offer.

■ noun

1.

[ C ] the first letter of a person's first name :

'What initial is it, Mrs Owen?' 'It's J, J for Jane.'

2.

initials [ pl. ] the first letters of all of a person's names :

John Fitzgerald Kennedy was often known by his initials JFK.

Just write your initials.

■ verb

( -ll- , NAmE usually -l- ) [ vn ] to mark or sign sth with your initials :

Please initial each page and sign in the space provided.

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WORD ORIGIN

early 16th cent.: from Latin initialis , from initium beginning, from inire go in, from in- into + ire go.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.