someone who communicates by means of letters

Giving or given as an answer; responsive, Law Of or being a respondent in a proceeding, replying, noun_ someone who responds, the codefendant (especially in a divorce proceeding) who is accused of adultery with the corespondent, One who responds. See also correspondent

Sufficient to satisfy a requirement or meet a need, Equal to some requirement; proportionate, or correspondent; fully sufficient, verb_ obsolete To equalize; to make adequate