as much or as good as necessary for some requirement or purpose; fully sufficient, suitable, or fit (often followed by to or for ): This car is adequate to our needs. adequate food for fifty people.
2.
barely sufficient or suitable: Being adequate is not good enough.
3.
Law.reasonably sufficient for starting legal action: adequate grounds.
Origin: 1610–20; < Latinadaequātus matched (past participle of adaequāre). See ad-, equal, -ate1
1610s, from L. adæquatus "equalized," pp. of adæquare "to make equal to," from ad- "to" + æquare "make level," from æquus (see equal). The sense is of being "equal to what is required."
adequately
1620s, from adequate; originally a term in logic in ref. to correspondence of ideas and objects. Meaning "suitably" is recorded from 1680s.