1. the highest-ranking player in chess, officially recognized by an international chess organization
Usage: chess
2. a master or expert of the highest rank in a particular field or activity
Usage: martial arts; general

Examples

• She became a grandmaster at age 15, making her one of the youngest in chess history.
• The grandmaster defeated all challengers in the tournament.
• He studied under a grandmaster of karate for many years.
• The chess grandmaster analyzed the position carefully before making her move.
• Only a few hundred people worldwide hold the title of chess grandmaster.
• The martial arts grandmaster demonstrated advanced techniques to his students.