From Longman Dictionary of Contemporary Englishunicornu‧ni‧corn /ˈjuːnəkɔːn $ -ɔːrn/ noun [countable] RFan imaginary animal like a white horse with a long straight horn growing on its head
Examples from the Corpus
unicorn• She is a unicorn, thought Jay, contriving ways to have their paths cross.• Among the existing pseudo-entities, ghosts and unicorns are not especially dangerous.• During his chaste vigil he had a vision of wolves, bears, lions, leopards and unicorns.• In the Empire they would be called unicorn.• There are also problems with words like unicorn, roc, elf and dragon.• She doodled a small, ugly dwarf, then a couple of unicorns.• Pope Gregory the Great had spoken of taming the wild unicorn, symbol of the man of power.Origin unicorn (1200-1300) Old French unicorne, from Late Latin unicornis, from Latin uni- + cornu “horn” 