as in (EN)

phrase

phrase “as in”

1. used to clarify the spelling or grammar of a word by providing an example
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   My code is X5Z, that's X as in xylophone.
2. used to specify the intended meaning of a word or phrase when it has multiple meanings; in the sense of
   I told her I was running late—as in, I would arrive after dinner started.
3. used to rephrase or emphasize a statement; that is to say
   He's a real bookworm—as in, he reads for hours every day.