(noun)
a person on an online platform such as social media who makes offensive, inflammatory, or irrelevant comments or who shares otherwise disruptive content in order to antagonize people;
e.g. A troll kept posting offensive comments on the article.
(noun)
fishing bait, or a fishing line equipped with a baited hook, that is trailed behind a moving boat and thus used to catch fish;
e.g. He cast his troll into the water behind the boat.
(verb)
to catch (or try to catch) fish by trailing a baited hook behind a moving boat, or to pull a baited hook through the water behind a moving boat for this purpose;
e.g. He showed her how to troll the hook behind the boat.
(verb)
to intently search for something or to search at or in something, often similar to a predator searching for prey;
e.g. He plans to troll all the cupboards in the room for important documents.
(verb)
to deliberately antagonize, harass, or criticize someone, especially in an online space, by offering inflammatory, provocative, offensive, mocking, or irrelevant comments or otherwise disruptive content,
e.g. He was warned not to troll people on the website anymore.