1. relating or belonging to the class of compounds not having a carbon basis; - Example: "hydrochloric and sulfuric acids are called inorganic substances"
2. lacking the properties characteristic of living organisms;
The Collaborative International Dictionary of English v.0.48:
Inorganic \In`or*gan"ic\, a. [Pref. in- not + organic: cf. F.
1. Not organic; without the organs necessary for life; devoid
of an organized structure; unorganized; lifeness;
2. (Chem.) Of or pertaining to compounds that are not
derivatives of hydrocarbons; not organic.
Note: The term inorganic is used to denote any one the large
series of substances (as minerals, metals, etc.), which
are not directly connected with vital processes, either
in origin or nature, and which are broadly and
relatively contrasted with organic substances. See
Inorganic Chemistry. See under Chemistry.
WordNet (r) 3.0 (2006):
adj 1: relating or belonging to the class of compounds not
having a carbon basis; "hydrochloric and sulfuric acids
are called inorganic substances" [ant: organic]
2: lacking the properties characteristic of living organisms