be best friends with
Definition of be best friends with
: to be someone's closest friend She is best friends with my younger sister.
Word by Word Definitions
: superlative ofgood
: excelling all others
: most productive of good : offering or producing the greatest advantage, utility, or satisfaction
: superlative ofwell
: in the best (see 1best) way : to greatest advantage
: the best (see 1best) state or part
: one that is best
: the greatest degree of good or excellence
: to get the better of : outdo
: had best (see 2best 1)
Seen and Heard
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