Source : Webster's Revised Unabridged Dictionary (1913)

Technical \Tech"nic*al\, a. [Gr. ?, fr. ? an art, probably from
   the same root as ?, ?, to bring forth, produce, and perhaps
   akin to E. text: cf. F. technique.]
   Of or pertaining to the useful or mechanic arts, or to any
   science, business, or the like; specially appropriate to any
   art, science, or business; as, the words of an indictment
   must be technical. --Blackstone.

Source : WordNet®

technical
     adj 1: of or relating to technique; "technical innovation in recent
            novels"; "technical details"
     2: characterizing or showing skill in or specialized knowledge
        of applied arts and sciences; "a technical problem";
        "highly technical matters hardly suitable for the general
        public"; "a technical report"; "producing the A-bomb was a
        challenge to the technical people of this country";
        "technical training"; "technical language" [ant: {nontechnical}]
     3: of or relating to proficiency in a practical skill; "no
        amount of technical skill and craftsmanship can take the
        place of vital interest"- John Dewey
     4: of or relating to a practical subject that is organized
        according to scientific principles; "technical college";
        "technological development" [syn: {technological}]
     5: resulting from or dependent on market factors rather than
        fundamental economic considerations; "analysts content
        that the stock market is due for a technical rally"; "the
        fall is only a technical correction"
     6: of production of chemicals for commercial purposes
        especially on a large scale; "technical (or commercial)
        sulfuric acid"

technical
     n 1: a pickup truck with a gun mounted on it
     2: (basketball) a foul that that can be assessed on a player or
        a coach or a team for unsportsmanlike conduct; does not
        usually involve physical contact during play [syn: {technical
        foul}]