Real Dictionary

lighter
countable noun: A lighter is a small device that produces a flame which you can use to light cigarettes, cigars, and pipes.

lighter in American English 1
a person or thing, as a mechanical or electrical device, that lights something or starts it burning
noun: a person or thing that lights or ignites

lighter in American English 2
a large, open barge used chiefly to load or unload ships anchored in a harbor
to transport (goods) in a lighter
noun: a large, open, flat-bottomed barge, used in unloading and loading ships offshore or in transporting goods for short distances in shallow waters
transitive verb: to convey in or as if in a lighter

lighter in British English 1
noun: a small portable device for providing a naked flame or red-hot filament to light cigarettes, etc

lighter in British English 2
noun: a flat-bottomed barge used for transporting cargo, esp in loading or unloading a ship