Abbreviation n. : The act of shortening, or reducing.

Abbreviation n. : The result of abbreviating; an abridgment.

Abbreviation n. : The form to which a word or phrase is reduced by contraction and omission; a letter or letters, standing for a word or phrase of which they are a part; as, Gen. for Genesis; U.S.A. for United States of America.

Abbreviation n. : One dash, or more, through the stem of a note, dividing it respectively into quavers, semiquavers, or demi-semiquavers.

Example:
What Abbreviation for the book of Philippians in the Bible should should I use?

Taxonomy
abbreviation, periods, acronyms, syllabic abbreviation, full stops, Syllabic abbreviations, word abbreviation, lower case, initialisms, rule, Contraction, British publications, United States, style guides, List of acronyms and initialisms, capital letter, exceptions, full point.

Defination from the web:
abbreviation (from Latin brevis, meaning "short") is a shortened form of a word or phrase. ... Likewise, a century earlier in Boston, a fad of abbreviation started that swept the United States, with the globally popular term OK generally ...