Adjectives function as nouns
Some adjectives are used as nouns to describe groups of people. For example, when we refer to sick people, we can simply say the sick. The adjective takes the place of the noun and the noun that the adjective modifies is removed. Each of these adjectives must follow the definite the. There are the blind, the deaf, the elderly, the famous, the homeless, the innocent, the intelligent, the jobless, the meek, the old, the poor, the politically correct, the privileged, the rich, the sick, the strong, the underprivileged, the unemployed, the weak, the wealthy, the young, etc.
The nouns are used in the plural and the verbs that follow them must therefore be plural
Sometimes, the noun is a singular
Adjectives used as nouns without ‘the’
The word the need not always have to follow the adjectival noun. It depends on how the adjectival noun is used in a sentence.
Possession of adjectival nouns
The possession of adjectival nouns is not normally indicated by the use of an apostrophe s ( ‘s ). The correct way is to use of as shown here.