From The Collaborative International Dictionary of English v.0.48 [gcide]:
1. (Gram.) A word employed to connect a noun or a pronoun, in an adjectival or adverbial sense, with some other word; a particle used with a noun or pronoun (in English always in the objective case) to make a phrase limiting some other word; -- so called because usually placed before the word with which it is phrased; as, a bridge of iron; he comes from town; it is good for food; he escaped by running.
From WordNet (r) 3.0 (2006) [wn]:
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