Definition of know best
- I would take the highway myself, but you live here so you know best.
- I'll do whatever you say. You know what's best.
: to perceive directly : have direct cognition of
: to have understanding of
: to recognize the nature of : discern
: superlative of good
: excelling all others
: most productive of good : offering or producing the greatest advantage, utility, or satisfaction
: superlative of well
: 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)
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