Definitions
1.VerbTo replace (someone) with someone else; to bring into another's position; especially, to take (a second wife) quickly after the death of a first, or while she is still alive.
2.VerbTo bring in or introduce as an addition; to produce, cause, bring on.
3.VerbTo cause (especially further disease) in addition (to an existing medical condition).
4.VerbTo place over (something or someone); to cover.