The lid plugin integrates the GNU id-utils lid tool with Vim to lookup keywords in the ID database.

For more information about id utilities (lid, aid, etc), visit the following pages:

http://www.gnu.org/software/idutils/idutils.html
https://www.gnu.org/software/idutils/manual/idutils.html

You can download the id-utils binaries for MS-Windows from:

http://gnuwin32.sourceforge.net/packages/id-utils.htm