Longman Dictionary of Contemporary English
Wiktionary
n. (context British English) A disposable plastic bag used inside of a permanent container to hold waste / garbage
WordNet
n. a plastic bag used to line a trash or garbage bin
Usage examples of "bin liner".
An old fat woman who had been fitfully browsing through the bulging black bin liner of her possessions began to twist the top of it together and fold it.
There, nestling in the folds of the fresh black bin liner, were his eggs, his bacon, his chocolate custard and his simple half-pound of butter.
The unwritten rule is that whatever you dont want you throw into a bin liner for the other blokes to sort through.
Half a dozen inmates have filled a black bin liner with water, and added tea bags, sugar, stale bread, butter and beans.
Through the sash window he could see the bin liner he'd placed outside the back door the night before.