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to open (a door, etc.); to unwrap (e.g. parcel, package); to unlock
to open (for business, etc.)
to empty; to remove; to make space; to make room
to move out; to clear out
to be away from (e.g. one's house); to leave (temporarily)
to dawn; to grow light
to end (of a period, season)
to begin (of the New Year)
to leave (one's schedule) open; to make time (for)
to make (a hole); to open up (a hole)
窓を空けて風を入れよう。
Let's open the window and let the air in.
箱を空けたら中に何もなかった。
I opened the box and there was nothing inside.
このプレゼントは誕生日まで空けないでね。
Don't open this present until your birthday.