1 bitter /ˈbɪtɚ/ adjective
1 bitter
Learner's definition of BITTER
[more bitter; most bitter]
◊ The form bitterer is almost never used to mean “more bitter,” but the form bitterest is commonly used to mean “most bitter.”
: having a strong and often unpleasant flavor that is the opposite of sweet
: causing painful emotions : felt or experienced in a strong and unpleasant way
◊ A bitter pill or a bitter pill to swallow is something that is difficult or painful to accept.
: angry and unhappy because of unfair treatment
: feeling or showing a lot of hatred or anger

to/until the bitter end

: until the end of something that may be very bad, unpleasant, etc.

— bitterly


— bitterness

noun [noncount]
2 bitter /ˈbɪtɚ/ noun
plural bitters
2 bitter
plural bitters
Learner's definition of BITTER
bit*ters [plural] : a bitter alcoholic liquid that is used especially in mixed drinks
British : a type of beer that has a slightly bitter flavor