Dictionary definition: abbreviation

abbreviation A shortened form of a word or phrase, standing for the whole.

This term is applied in three different ways.
a. A string of letters—often spoken as such—formed from the initial letters of the (main) words of a phrase. Also called INITIALISM .

BBC

(British Broadcasting Corporation)

CBI

(Confederation of British Industry)

ERM

(Exchange Rate Mechanism)

OTT

(over the top)

PC

(personal computer)

UK

(United Kingdom)



Sometimes the letters represent syllables of a word.

ID

(identity or identification card)

TB

(tuberculosis)



b. A word (sometimes called a CLIPPING ) standing for the whole, retaining at least one syllable of the original word.

ad

(advertisement) (M19)

demo

(demonstration) (M20)

flu

...

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