(~s)
1.
A ~ is someone who lives in a particular constituency, especially someone who is able to vote in an election.
N-COUNT
2.
A ~ of a mixture, substance, or system is one of the things from which it is formed.
Caffeine is the active ~ of drinks such as tea and coffee.
N-COUNT: usu N of n
3.
The ~ parts of something are the things from which it is formed. (FORMAL)
...a plan to split the company into its ~ parts and sell them separately.
ADJ: ADJ n