(~s)
Frequency: The word is one of the 3000 most common words in English.
1.
A ~ is a successful attempt by a large group of people to change the political system of their country by force.
The period since the ~ has been one of political turmoil.
N-COUNT
2.
A ~ in a particular area of human activity is an important change in that area.
The nineteenth century witnessed a ~ in ship design and propulsion.
N-COUNT: with supp