详细解释:n. 前置词, 介词
英语解释：
名词 preposition:
a function word that combines with a noun or pronoun or noun phrase to form a prepositional phrase that can have an adverbial or adjectival relation to some other word(linguistics) the placing of one linguistic element before another (as placing a modifier before the word it modifies in a sentence or placing an affix before the base to which it is attached)例句：
Preposition is abbreviated as "prep" in this dictionary.介词在词典中略作 “prep”。