Meaning of “furtive” - Learner’s Dictionary

furtive

adjective uk us /ˈfɜːtɪv/

doing something secretly, or done secretly, so that people do not notice:

He gave her a furtive glance as soon as his wife left the room.
furtively adverb

(Definition of “furtive” from the Cambridge Learner’s Dictionary © Cambridge University Press)