full
The word 'voll' in German is used to express that something is full or completely filled. It can be used with various nouns, such as a 'voller Teller' (full plate) or a 'voller Raum' (full room). It is also used in phrases like 'voll sein' to express that someone is drunk or intoxicated.
The glass is full.
This is a basic application of the word 'voll', which translates to 'full'. It is used in the same context as English to describe a container or space filled to capacity.
I am very tired.
In colloquial German language, 'voll' is often used before adjectives to mean 'very'. In this case 'voll müde' means 'very tired'.
The concert was very loud.
Here again, 'voll' is used in colloquial German language before an adjective to give emphasis. 'Voll laut' translates to 'very loud'. This is not the most formal way of expressing this in German but is commonly used in conversational speech.