əz æz (preposition) 1 used to describe somebody/something appearing to be somebody/something else They were all dressed as clowns. The bomb was disguised as a package. 2 used to describe the fact that somebody/something has a particular job or function She works as a courier. Treat me as a friend. I respect him as a doctor. You can use that glass as a vase. The news came as a shock. She had been there often as a child (=when she was a child).