1. [n]  (biology) a group of organisms within a species that differ in trivial ways from similar groups; "a new strain of microorganisms"
2. [n]  a unit of electrical power in an AC circuit equal to the power dissipated when 1 volt produces a current of 1 ampere

VAR is a 3 letter word that starts with V.

1. value added reseller (or retailer).

2. /veir/ or /var/ Short for "variable". Compare arg, param.

[jargon file]