Tanker can refer to:
Tanker , a ship designed to carry bulk liquids
Chemical tanker
Petroleum tanker, also known as an oil tanker
LNG carrier, a ship designed for transporting liquefied natural gas, sometimes known as a tanker
tank car, also known as a tanker or cylinder wagon is a railroad freight car designed for carrying bulk liquids
tank truck, also known as a tanker or tanker lorry is a heavy road vehicle designed for the same purpose
Water tender or tanker, a firefighting vehicle used to carry large amounts of water to a fire
Tanker , an airplane designed for in-flight refuelling
Any crew member of a tank
André Tanker, a Trinidadian musician and composer
Tank or tanker, in the massive-multiplayer lingo is a character able to resist heavy amounts of damage relatively unharmed
Source:
http://en.wikipedia.org/wiki/Tanker