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."