I. troll 1 /trəʊl, trɒl $ troʊl/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Language: Norwegian ; Origin: troll and Danish trold , from Old Norse troll 'evil creature, giant' ]
an imaginary creature in stories that looks like an ugly person
II. troll 2 BrE AmE verb [intransitive and transitive] American English
1 . to try to remove something from a river, ocean etc by pulling a rope, line etc through the water:
Ships towing huge magnets trolled the ocean floor.
troll for
I would troll for fish from the rowboat.
2 . to try to obtain something by searching, asking people etc SYN trawl British English
troll (something) for something
Stewart spent hours trolling the Web for information.