Covered with or full of dust. The old bookshelf was dusty from years of neglect.
Having a dull or muted color, often resembling the color of dust. She wore a dusty pink dress to the party.
Lacking freshness or originality; stale. The lecture was filled with dusty ideas that failed to engage the students.
Curt, cold, or unwelcoming (chiefly archaic, usually of a reply). He received a dusty answer when he asked for a favour.