Inactive

1. a. Not active; inert; esp., not exhibiting any action or activity on polarized light; optically neutral; — said of isomeric forms of certain substances, in distinction from other forms which are optically active; as, racemic acid is an inactive tartaric acid.
2. a. Not active; having no power to move; that does not or can not produce results; inert; as, matter is, of itself, inactive.
3. a. Not disposed to action or effort; not diligent or industrious; not busy; idle; as, an inactive officer.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.