'Tank ship' definitions:

Definition of 'tank ship'

From: WordNet
noun
A cargo ship designed to carry crude oil in bulk [syn: oil tanker, oiler, tanker, tank ship]

Definition of 'Tank ship'

From: GCIDE
  • Tank ship \Tank ship\, Tank vessel \Tank vessel\ . (Naut.) A vessel fitted with tanks for the carrying of oil or other liquid in bulk; -- called also tanker. A tank ship of very large capacity is called a supertanker. [Webster 1913 Suppl. +PJC]