Meaning of “scale” - Learner’s Dictionary

scale

noun uk us /skeɪl/
SIZE [ no plural ]

B2 the size or level of something:

We don't yet know the scale of the problem.
Nuclear weapons cause destruction on a massive scale (= cause a lot of destruction).
large-/small-scale

A large-/small-scale event or activity is large/small in size:

a large-scale investigation
MEASURING SYSTEM [ C ]

B2 the set of numbers, amounts, etc used to measure or compare the level of something:

How would you rate her work on a scale of 1-10?
EQUIPMENT [ C ] US (UK scales [ plural ])
COMPARISON [ C, U ]

B2 how the size of things on a map, model, etc relates to the same things in real life:

a map with a scale of one centimetre per ten kilometres
MUSIC [ C ]

a series of musical notes that is always played in order and that rises gradually from the first note

SKIN [ C ]

one of the flat pieces of hard material that covers the skin of fish and snakes

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