Noah Webster's New International Dictionary of the English Language

1. (a.) Probable; credible; as, a likely story.

2. (a.) Having probability; having or giving reason to expect; -- followed by the infinitive; as, it is likely to rain.

3. (a.) Similar; like; alike.

4. (a.) Such as suits; good-looking; pleasing; agreeable; handsome.

5. (a.) Having such qualities as make success probable; well adapted to the place; promising; as, a likely young man; a likely servant.

6. (adv.) In all probability; probably.