From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( a.) Particular; peculiar; different from others; extraordinary; uncommon.

(2): ( a.) Of or pertaining to a species; constituting a species or sort.

(3): ( a.) Appropriate; designed for a particular purpose, occasion, or person; as, a special act of Parliament or of Congress; a special sermon.

(4): ( a.) Limited in range; confined to a definite field of action, investigation, or discussion; as, a special dictionary of commercial terms; a special branch of study.

(5): ( a.) Chief in excellence.

(6): ( n.) A particular.

(7): ( n.) One appointed for a special service or occasion.

Vine's Expository Dictionary of NT Words [2]

 Acts 19:11 Acts 28:2Common

King James Dictionary [3]

Special n. A particular. Not Used.