a cargo ship designed to carry crude oil in bulk
"The massive tanker slowly navigated through the foggy channel, loaded with thousands of barrels of crude oil destined for the refinery."
a soldier who drives a tank
"The veteran tanker maneuvered his armored vehicle through the narrow alley to flank the enemy position."
A tank ship, a vessel used to transport large quantities of liquid.
"The tanker navigated through the stormy channel while carrying thousands of barrels of crude oil."
To transport (oil, etc.) in a tanker.
"The crew loaded the crude oil and prepared to tanker it across the ocean before sunset."