booster

boost|er /b'uːstər/ (boosters)
1 [N-COUNT] usu n N
A booster is something that increases a positive or desirable quality.
It was amazing what a morale booster her visits proved...
Praise is a great confidence booster.
2 [N-COUNT]
A booster is an extra engine in a machine such as a space rocket, which provides an extra amount of power at certain times.
Ground controllers will then fire the booster, sending the satellite into its proper orbit.
3 [N-COUNT]
A booster is a small injection of a drug that you have some time after a larger injection, in order to make sure that the first injection will remain effective.
4 [N-COUNT] oft supp N, N n
A booster is someone who supports a sports team, organization, person, or place very enthusiastically. (AM)
A former associate of Mr. Pierce's was among the project's boosters.
= supporterboost|er seat (booster seats)
also booster cushion
[N-COUNT]
A booster seat or a booster cushion is a special seat which allows a small child to sit in a higher position, for example at a table or in a car.mo|rale boost|er (morale boosters)
[N-COUNT] usu sing
You can refer to something that makes people feel more confident and cheerful as a morale booster.
This win has been a great morale booster.

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