definition of
churn

[1] #1 churn v. stir (cream) vigorously in order to make butter. wn

[2] #2 churn n. [butter churn] a vessel in which cream is agitated to separate butterfat from buttermilk. wn

[3] #3 churn v. [boil, moil, roil] be agitated; "the sea was churning in the storm". wn