The term "stalk" can refer to a number of different meanings depending on its context.
In botany, stalk refers to the stem and leaves of a plant that support it above ground level. In this sense, it is the vertical axis connecting the root system with the aerial parts of the plant.
However, in everyday language, "stalk" often means following or watching someone persistently, usually in an unwanted manner. This behavior can involve observing a person's movements, checking their social media accounts, or contacting them repeatedly despite being asked to stop.
In addition, the term stalk is also used metaphorically to describe someone who is overly interested or focused on something or someone, often in an unhealthy way. For example, "He's been stalking that new job opportunity for weeks."
Overall, depending on context and usage, the word "stalk" can have varying meanings but generally connotes a sense of unwanted attention or persistent behavior.