Meaning & use
monomaniac
A person who is obsessively fixated on a single idea, goal, or subject.
See it in a sentence
Colleagues joked that he was a monomaniac about efficiency, timing every task down to the second.
The character is portrayed as a monomaniac driven only by revenge.
A note on using this word
Monomaniac is often used with mild exaggeration or humor to describe someone intensely focused on one thing.
Words with a similar meaning
fanaticobsessive
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
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