meddling

(noun) the act of altering something secretly or improperly. Synonyms: tampering.

(verb) intrude in other people's affairs or business; interfere unwantedly. Synonyms: meddle, tamper. Example: "Don't meddle in my affairs!."

(adj) intrusive in a meddling or offensive manner. Synonyms: interfering, meddlesome, officious, busy, busybodied. Examples: "An interfering old woman." "Bustling about self-importantly making an officious nuisance of himself." "Busy about other people's business."