What does adequate mean?
The definition of adequate
Ad”e*quate, a.
Etym: [L. adaequatus, p. p. of adaequare to make equal to; ad + aequare to make equal, aequus equal. See Equal.]

Equal to some requirement; proportionate, or correspondent; fully sufficient; as, powers adequate to a great work; an adequate definition. Ireland had no adequate champion. De Quincey.

Synonyms
— Proportionate; commensurate; sufficient; suitable; competent; capable.

Ad”e*quate, v. t.
Etym: [See Adequate, a.]

1 To equalize; to make adequate. [R.] Fotherby.
2 To equal. [Obs.] It [is] an impossibility for any creature to adequate God in his eternity. Shelford.