1. remained hidden while waiting or watching, especially with bad intentions
Usage: past tense of lurk
2. existed as a hidden threat or danger
Usage: past tense of lurk
3. read posts or messages online without participating in the discussion
Usage: past tense of lurk; internet slang

Examples

• The thief lurked in the shadows waiting for the right moment.
• Danger lurked around every corner in the abandoned building.
• She lurked behind the trees, watching the house.
• A sense of unease lurked beneath his calm exterior.
• He lurked in the online forum for months before making his first post.
• The cat lurked under the porch, ready to pounce on unsuspecting mice.
• Doubts lurked in her mind about the decision she had made.