2. Curious, inquisitive, meddlesome, prying refer to taking an undue (and petty) interest in others' affairs. Curious implies a desire to know what is not properly one's concern: curious about a neighbor's habits. Inquisitive implies asking impertinent questions in an effort to satisfy curiosity: inquisitive about a neighbor's habits. Meddlesome implies thrusting oneself into and taking an active part in other people's affairs entirely unasked and unwelcomed: a meddlesome cousin who tries to run the affairs of a family. Prying implies a meddlesome and persistent inquiring into others' affairs: a prying reporter inquiring into the secrets of a business firm.

Did you mean crossness?