「大きい」 (Ōkii) is an i-adjective meaning 'big' or 'large'. You use it to describe the size of objects, places, or even concepts. It directly modifies a noun to indicate that something is of considerable size. For instance, a big house or a large dog.

「大(おお)きい」は「big, large」という意(い)味(み)のい形容(けいよう)詞(し)です。物(もの)や場(ば)所(しょ)の大(おお)きさを表(あらわ)します。