know from - definition and synonyms

phrasal verb [transitive]
present tense
I/you/we/theyknow from
he/she/itknows from
present participleknowing from
past tenseknew from
past participleknown from
  1. know someone/something from someone/something to recognize the difference between two people or things

    Most people wouldn’t know it from real champagne.

See also
See also main entry: know