Foolish \Fool"ish\, a.

1. Marked with, or exhibiting, folly; void of understanding; weak in intellect; without judgment or discretion; silly; unwise.

I am a very foolish fond old man. --Shak.

2. Such as a fool would do; proceeding from weakness of mind or silliness; exhibiting a want of judgment or discretion; as, a foolish act.

3. Absurd; ridiculous; despicable; contemptible.

A foolish figure he must make. --Prior.

Syn: Absurd; shallow; shallow-brained; brainless; simple; irrational; unwise; imprudent; indiscreet; incautious; silly; ridiculous; vain; trifling; contemptible. See Absurd.

Source: Webster's Revised Unabridged Dictionary (1913)