1. To move or wait in a hidden place, especially with the intention of doing something harmful or secretive:
* "The burglar lurked in the shadows, waiting for the perfect moment to strike."
* "A predator lurks in the tall grass, waiting for its prey."
2. To exist or be present in a hidden or unnoticed way:
* "The threat of war still lurks in the background."
* "A sense of danger lurked in the air."
3. To be online or in a chat room without actively participating:
* "He lurked in the chat room, reading the messages but not posting anything."
4. To spend time in a place without a clear purpose:
* "They lurked around the coffee shop, hoping to bump into someone they knew."
5. To be present in a place in a creepy or threatening way:
* "The ghost of the old house lurked in the attic."
* "The abandoned factory lurked on the edge of town."
The specific meaning of "lurk" will depend on the sentence and the context in which it is used.