MUS'TY, adjective [from must.] Moldy; sour; foul and fetid; as a musty cask; musty corn or straw; musty books. 1. State; spoiled by age. The proverb is somewhat musty 2. Having an ill flavor; as musty wine. 3. Dull; heavy; spiritless. That he may not grow musty and unfit for conversation.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI