Doorman (noun)

1. A person employed to open doors for guests, especially in a hotel or apartment building.
2. A person employed to monitor the entrance to a building or establishment, often for security purposes.

Origin:

Early 20th century, from door + man.

Examples:

1. The doorman welcomed the guests with a smile and held the door open for them.
2. The doorman checked the identification of everyone entering the building.
3. The doorman at the hotel was always helpful, giving directions and making recommendations.
4. The doorman's job was to ensure the safety of the residents of the building.
5. The doorman was in charge of announcing the arrival of guests to the host.