Definition of as of

: on, at, from used to indicate a time or date at which something begins or endstakes effect as of July 1As of now, it's difficult to tell in a cancer's early stage which patients have which kind of tumor.— Melinda BeckAs of last year [2010], women held 51.4 percent of all managerial and professional positions, up from 26 percent in 1980 …— Kate Bolick

First Known Use of as of

1781, in the meaning defined above

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The first known use of as of was in 1781

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Cite this Entry

“As of.” Dictionary, Merriam-Webster, Accessed 19 Jan. 2021.

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Kids Definition of as of

: on entry 1 sense 5, at We begin work as of Tuesday.

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