Definition of Furtive: Furtive (adjective): Attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble; secretive. Synonyms: stealthy, secretive, sly, surreptitious Antonyms: open, overt, obvious, forthright Memory Tip: Think of “furtive” as someone “furtively” sneaking around, trying not to be seen. Conversation and Short Story Examples…