As an adjective describing something timeless and high quality:
* "The Little Mermaid is a classic Disney movie that never gets old."
* "He wore a classic black suit to the wedding."
* "The band played a set of classic rock anthems."
As an adjective describing something typical or characteristic:
* "This is a classic case of mistaken identity."
* "He made a classic blunder by forgetting to set his alarm."
* "The movie features all the classic horror movie tropes."
As a noun meaning a work of art, literature, or music that is considered to be of lasting value:
* "Shakespeare's plays are considered classics of English literature."
* "The museum houses a collection of classics from the Impressionist movement."
* "Mozart's Requiem is a classic of the choral repertoire."
As a noun meaning something that is typical or representative of a particular style, genre, or period:
* "The restaurant serves classics like spaghetti and meatballs and chicken parmesan."
* "She collects classics from the 1950s, like vintage cars and diner signs."
* "The store sells classics like Levi's jeans and Converse sneakers."
Using "classic" as a verb:
* "The band classed up the event with their performance." (Meaning they made the event more elegant or prestigious)
The meaning of "classic" will depend on the context in which it is used.