Verb (5-dan, う, transitive)
1. to use (a tool, method, etc.); to make use of; to put to use
この部屋を使っています。I am using this room.
2. to use (a person, animal, puppet, etc.); to employ; to handle; to manage; to manipulate
3. to use (time, money, etc.); to spend; to consume
デートはお金を使うものなんだって。They say that dates are something that costs money.
4. to use (language); to speak
その言い方はあまり使いたくないですね。I don't really want to use that phrasing.