in?ter?lop?er (ntr-lpr)
n.
1. One that interferes with the affairs of others, often for selfish reasons; a meddler.
2. One that intrudes in a place, situation, or activity.
3. Archaic
a. One that trespasses on a trade monopoly, as by conducting unauthorized trade in an area designated to a chartered company.
b. A ship or other vessel used in such trade.
