as a noun, 'full' is less commonly used, but it can refer to the maximum or highest degree of something.
The dress was let out to its full to fit her.
The fabric was spread to its full to display the pattern.
The song was played to its full, filling the room with music.
the noun form of 'full' is less common than its adjective and adverb forms. It's often used in specific contexts, especially related to the extent or spread of something
as an adjective, 'full' describes something that is complete or contains as much as is possible or allowed.
used for referring to the maximum capacity or amount; describing completeness or entirety; indicating a state of abundance.
The glass is full of water.
She gave her full attention to the lecture.
The moon is full tonight.
'full' can be used in various contexts, from physical capacities to metaphorical or abstract senses.
as an adverb, 'full' describes an action done with a lot of force or intensity.
The car hit the tree full on.
He ran full into the crowd without stopping.
The boxer hit his opponent full in the face.
when used as an adverb, 'full' often describes a direct or forceful action.