Meaning ofsirin English

Noun

1. a title for a knight or low-ranking noble; showing respect
   The king addressed the noble sir with great respect.
2. a polite term for a senior military officer
   The captain greeted the senior officer as sir during inspection.
3. a term used to address a teacher
   The students called their instructor sir out of respect.
4. a respectful greeting for an unknown adult male
   A stranger approached the lost child and said hello sir.