1. a title of respect used before a man’s name or when addressing a man
Usage: often abbreviated as Mr.
2. a man, especially when the speaker does not know his name
Usage: informal

1. to address or refer to someone as mister
Usage: rare

Examples

• Mister Johnson will see you now.
• Good morning, mister.
• Hey mister, you dropped your wallet!
• The teacher told the students to call him Mister Smith.
• Excuse me, mister, do you know what time it is?
• She mistered him politely despite not knowing his name.