1.Definition: a person who backs a politician or a team etc.

Related Noun(s):admirer, champion, friend, protagonist, supporter

Category: People

2.Definition: a thief who steals goods that are in a store

Related Noun(s):lifter, shoplifter

Category: People

3.Definition: an additional dose that makes sure the first dose was effective

Category: Objects

4.Definition: an amplifier for restoring the strength of a transmitted signal

Category: Objects

5.Definition: someone who is an active supporter and advocate

Related Noun(s):plugger, promoter

Category: People

6.Definition: the first stage of a multistage rocket

Category: Objects