(BrE also prioritise) verb
1 to put tasks, problems, etc. in order of importance, so that you can deal with the most important first:
[VN] You should make a list of all the jobs you have to do and prioritize them. [also V]
2 [VN] (formal) to treat sth as being more important than other things:
The organization was formed to prioritize the needs of older people.
prioritization, prioritisation noun [U]
