laptop UK /ˈlæp.tɒp/US /ˈlæp.tɑp/noun 1adjective 1verb 1forms 3 noun1 •a computer light enough to carry, with a screen that closes down onto the keysHe was playing a video game on his laptop. adjective1 •Designed for use on a lap.At NCC, however, laptop portables such as the Gavilan were stealing the show, and when Miyashita returned to japan, his list of possible projects included a proposal for a portable computer. — 1984 verb1 •To use a laptop computer. formslaptoped · laptoping · laptops