(usually in the plural bitters) A liquid or powder, made from bitter herbs, used in mixed drinks or as a tonic.
A type of beer heavily flavored with hops.
A turn of a cable about the bitts.
To make bitter.
Having an acrid taste (usually from a basic substance).
The coffee tasted bitter.
Harsh, piercing or stinging.
Hateful or hostile.
They're bitter enemies.
Cynical and resentful.
I've been bitter ever since that defeat.
(in combination) A hardware system whose architecture is based around units of the specified number of bits (binary digits).