1. a person who monopolizes something; one who has or seeks exclusive control or possession of something

Examples

• He was a monopolizer of the conversation, never letting others speak.
• The company became a monopolizer of the local market.
• She’s a monopolizer of attention at every party.
• The monopolizer controlled all the resources in the region.
• Don’t be a monopolizer of the remote control.
• The monopolizer refused to share the equipment with other teams.