shadow -- (a premonition of something adverse; "a shadow over his happiness")
trace, vestige, tincture, shadow -- (an indication that something has been present; "there wasn't a trace of evidence for the claim"; "a tincture of condescension")
shadow -- (refuge from danger or observation; "he felt secure in his father's shadow")
shadow -- (a dominating and pervasive presence; "he received little recognition working in the shadow of his father")
tail, shadow, shadower -- (a spy employed to follow someone and report their movements)
shadow -- (an inseparable companion; "the poor child was his mother's shadow")
Overview of verb shadow
The verb shadow has 3 senses
shadow -- (follow, usually without the person's knowledge; "The police are shadowing her")