The adj adequate has 3 senses (first 3 from tagged texts)
1. (17) adequate -- ((sometimes followed by `to') meeting the requirements especially of a task; "she had adequate training"; "her training was adequate"; "she was adequate to the job")
2. (4) adequate, decent, enough -- (enough to meet a purpose; "an adequate income"; "the food was adequate"; "a decent wage"; "enough food"; "food enough")
3. (1) adequate, passable, fair to middling, tolerable -- (about average; acceptable; "more than adequate as a secretary")