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Definitions

booster

[boo-ster] / ˈbu stər /
NOUN
supporter
Synonyms
Antonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The MenB vaccine is recommended for babies aged eight weeks, followed by a second dose at 12 weeks and a booster at one year.

From BBC • Mar. 18, 2026

Using a standard booster approach in mice, both vaccine types produced similar antiviral T cell and antibody-producing B cell responses.

From Science Daily • Mar. 17, 2026

The booster involved has already flown 13 missions, and is expected to land on a ship in the Pacific Ocean.

From Los Angeles Times • Mar. 16, 2026

As one booster recently put it, Mr. Talarico’s faith is a potential draw to Texan voters who feel the Democratic Party “doesn’t respect their religion.”

From The Wall Street Journal • Feb. 19, 2026

"Ignition sequence start." "... three . . . two . . . one . . ." Clamps released, the booster rose amid a plume of smoke and fire, slowly at first, then racing ever faster.

From "The Martian" by Andy Weir