voyeur

noun, plural vo·yeurs [vwah-yurz, voi-; French vwa–yœr] /vwɑˈyɜrz, vɔɪ-; French vwaˈyœr/.

1. a person who engages in voyeurism.

noun

1. a person who obtains sexual pleasure or excitement from the observation of someone undressing, having intercourse, etc

n.

a scopophiliac, 1900, from French voyeur (1898), literally “one who views or inspects,” from voir “to view,” from Latin videre “to see” (see vision).

n.

1. A person who derives sexual gratification from observing the naked bodies or sexual acts of others, especially from a secret vantage point.
2. An obsessive observer of sordid or sensational subjects.