Take over

• to begin to do something that someone else was doing [Intransitive verb]

Can you take over the cooking while I walk the dog?

• take (something) over from someone:

I’ll take over from you for a moment.

• take over as something:

Jane took over as director after Richard retired.

• to take control of something [Intransitive verb]

IBM is taking over the smaller company. Gibraltar was taken over by Spain in 1462.