Host/həʊst/ Definition 1 of 5Pro Tip 1/3Social Gatherings Used for someone organizing and entertaining at social events, often at home. As the host, John prepared games for the evening. Pro Tip 2/3Positive Attitude A good host displays warmth and hospitality, making guests feel welcome. Our host greeted everyone with a warm smile. Pro Tip 3/3TV/Radio Usage Refers to someone who leads a broadcast program, engaging the audience. The radio host introduced the next song.