intransitive/transitive to make a choice about what you are going to dodecide to do something: He decided to stay and see what would happen.
The committee decided unanimously to accept the offer.
decide (that): I decided that it would be best to tell George everything.
decide what/whether/how/when/where etc: I can’t decide what to do.
She needs to decide whether or not she wants to keep the house.
decide between: Julia has to decide between being an architect or a novelist.
decide for yourself (=make a choice yourself and not ask or allow someone else to do it for you): ‘We think people should have the opportunity to decide for themselves what they want.’