Simple Definition of millstone
: either one of two large, flat, round stones that are used for grinding grain in a mill
: a problem or responsibility that does not go away and that makes it difficult or impossible to do or achieve something
Full Definition of millstone
1 : either of two circular stones used for grinding (as grain)
2 a : something that grinds or crushes b : a heavy burden
Examples of millstone in a sentence
College loans can quickly become a millstone for students.
The scandal has become a political millstone.
The scandal has been a millstone around her neck.
Before 12th Century
First Known Use of millstone
before 12th century
MILLSTONE Defined for Kids
Definition of millstone for Students
: either of two large circular stones used for grinding grain
Seen and Heard
What made you want to look up millstone? Please tell us where you read or heard it (including the quote, if possible).