Definition of "Stalk" :

noun: a stiff or threatening gait

noun: the act of following prey stealthily

noun: a hunt for game carried on by following it stealthily or waiting in ambush

noun: a slender or elongated structure that supports a plant or fungus or a plant part or plant organ

noun: material consisting of seed coverings and small pieces of stem or leaves that have been separated from the seeds

verb: walk stiffly

verb: go through (an area) in search of prey

"Stalk the woods for deer."

verb: follow stealthily or recur constantly and spontaneously to

"Her ex-boyfriend stalked her."