1. from the standpoint of; from the viewpoint of; with respect to; in terms of; as a matter of; in view of; so far as ... is concerned
はい、理論上はそうなります。Yes, theoretically that is how it works.
2. on; above; on top of; aboard (a ship or vehicle)
やがて、舞台上から人がいなくなる。Before long, there is no one left on the stage.
3. the best; top; first class; first grade
4. first volume (of a two or three-volume set); first book
5. with my compliments
written on a gift's wrapping paper