prep‧o‧si‧tion /ˌprepəˈzɪʃən/ noun [countable]
[Date: 1300-1400; Language: Latin; Origin: praepositio, from praeponere 'to put in front']
a word that is used before a noun, pronoun, or gerund to show place, time, direction etc. In the phrase ‘the trees in the park’, ‘in’ is a preposition.
—prepositional adjective

[TahlilGaran] Dictionary of Contemporary English ▲