special (Noun) — A special offering (usually temporary and at a reduced price) that is featured in advertising. ex. "they are having a special on pork chops"
special (Noun) — A dish or meal given prominence in e.g. a restaurant.
special (Noun) — A television production that features a particular person, work or topic. ex. "the last of a series of BBC specials on Iran is being shown tonight"
special (Adjective) — Unique or specific to a person or thing or category. ex. "the special features of a computer" ex. "my own special chair"
special (Adjective) — For a special service or occasion. ex. "a special correspondent" ex. "a special adviser to the committee" ex. "had to get special permission for the event"
special (Adjective) — Surpassing what is common, usual or expected. ex. "a special occasion" ex. "what's so special about the year 2000?"
special (Adjective) — Adapted to or reserved for a particular purpose. ex. "a special kind of paint" ex. "a special medication for arthritis"
special (Adjective) — Having a specific function or scope. ex. "a special role in the mission"
special (Adjective) — First and most important. ex. "his special interest is music" ex. "she gets special satisfaction from her volunteer work"
special (Adjective) — Added to a regular schedule. ex. "a special holiday flight" ex. "put on special buses for the big game"