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retrorocket a small rocket attached to a spacecraft and used to help the spacecraft slow down or change direction. Retrorockets fire in the direction opposite to the direction the main rocket is going in.
return to go back or come back. [10 definitions]
reunion a meeting of friends, family, or other people who have been apart from each other for a long time.
reveal to make known; tell. [2 definitions]
revelation the act of revealing. [2 definitions]
revenge to get even for or pay back by causing injury or harm. [4 definitions]
revenue money gained from selling property or investing money. [2 definitions]
reverence a feeling of great respect mixed with love.
reverse opposite in direction, position, or movement; backward. [9 definitions]
review an article in a newspaper or magazine that judges the worth of a recent book, film, play, or other work of art. [7 definitions]
revise to change or make different. [2 definitions]
revival the act or process of renewing or reviving. [3 definitions]
revive to bring back into use or popularity. [3 definitions]
revoke to take back, cancel, or make no longer valid.
revolt to rise up and fight against the government or other authority; rebel. [3 definitions]
revolution the overthrow of a political system or government by force, and the setting up of a new government in its place. [4 definitions]
revolutionary having to do with or marked by a desire for revolution. [3 definitions]
Revolutionary War see American Revolution.
revolve to turn or spin in place. [3 definitions]
revolver a pistol with a revolving cylinder that holds bullets. A revolver can fire several shots without having to be loaded each time.
reward something of value that is promised to someone for good work or a good deed. [3 definitions]