adjective

1. of a kind different from others; distinctive, peculiar, or unique
2. exceptional; extraordinary a special treat
3. highly regarded or valued a special friend
4. of or for a particular person, occasion, purpose, etc. by special permission, a special edition
5. not general or regular; specific or limited special legislation

Etymology: ME < OFr especial < L specialis < species, kind, sort: see species

noun

1. a special person or thing; specif., a special train, edition, sale offer or item, etc.
2. ☆ a single TV program, not part of a regular series