a person who pursues game, prey, or a person stealthily.
a person who harasses another person, as a former lover, a famous person, etc., in an aggressive, often threatening and illegal manner: Hollywood stars often have security guards to keep dangerous stalkers at bay.

Origin of stalker

stalk2 (verb) + -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for stalker

Contemporary Examples of stalker

Historical Examples of stalker

Word Origin and History for stalker

early 15c., "a poacher;" also "one who prowls for purposes of theft" (c.1500), agent noun from stalk (v.1). Meaning "obsessive harasser" is from early 1990s.

Online Etymology Dictionary, © 2010 Douglas Harper