Definition of “frame” - Learner’s Dictionary

frame

noun [ C ] uk us /freɪm/
PICTURE

B1 a structure that goes around the edge of something such as a door, picture, window, or mirror:

a picture frame
a window frame
STRUCTURE

B2 the basic structure of a building, vehicle, or piece of furniture that other parts are added onto:

a bicycle frame
BODY

the shape of someone's body:

his large/small frame

(Definition of “frame noun” from the Cambridge Learner's Dictionary © Cambridge University Press)