Of Definition

ŭv, ŏv; əv when unstressed
preposition
Derived or coming from; originating at or from.
Customs of the South.
American Heritage
From.
Webster's New World
Caused by; resulting from.
A death of tuberculosis.
American Heritage
Is what was done, expressed, etc. by.
How wise of her!
Webster's New World
Away from; at a distance from.
A mile east of here.
American Heritage
Synonyms:
abbreviation
Outfield.
Webster's New World
Old French.
Webster's New World
Outfielder.
Webster's New World

(military) NATO military rank code, equivalent to British army lieutenant and second lieutenant.

Wiktionary

(military) NATO military rank code, equivalent to British army field marshal.

Wiktionary
affix

Ob-

Offer.
Webster's New World
verb

(usually in modal perfect constructions) Representing have or 've, chiefly in depictions of colloquial speech.

Wiktionary
pronoun
(initialism) Old French.
Wiktionary

(initialism) Alternative form of OF.

Wiktionary
noun

(baseball, initialism) Outfield.

Wiktionary

(baseball, initialism) Outfielder.

Wiktionary
prefix

(UK) A regulatory body for a specified industry.

Wiktionary

Origin of Of

  • From Middle English of, from Old English of (“of, from"), an unstressed form of af, æf (“from, off, away"), from Proto-Germanic *ab (“from"), from Proto-Indo-European *hâ‚‚epo (“from, off, back"). Cognate with Scots of, af (“off, away"), West Frisian af, ôf (“off, away"), Dutch af (“off, from"), Low German af (“off, from"), German ab (“off, from"), Danish af (“of"), Swedish av (“of"), Icelandic af (“of"), Gothic 𐌰𐍆 (af, “of, from"); and with Latin ab (“of, from, by"). Compare off.

    From Wiktionary

  • Middle English from Old English apo- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • first syllable of office

    From Wiktionary

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