reference frames
nounUK /ˈrɛf.rəns freɪmz/
US /ˈrɛf.rəns freɪmz/
A reference frame is like a set of invisible lines you use to tell where something is or how it is moving.
The scientist used a reference frame to measure how fast the toy car was going.
RELATED WORDS
OTHER MEANINGS
2. A set of ideas or beliefs you use to understand something.
Each person looked at the problem from a different reference frame.
3. In physics, a system for measuring position and motion, which may be still or moving.
The train's reference frame moves along with the train.
4. A background or standard used to compare things.
We used the old photo as a reference frame for the new design.