To refuse or reject something (Ex.: He looked up to the offer because it didn't meet his expectations.)

To search for information about someone or something (Ex.: I had to look up to the meaning of this word in the dictionary.)

To admire and respect someone (Ex.: I really look up to my grandmother for all her achievements.)

To stand or rise above someone or something (Ex.: The tall building looked up to the sky.)

To reduce or decrease (Ex.: The company had to look up to the costs in order to stay afloat.)