Swear into Definition 1 of 1Pro Tip 1/3Ceremonial Context Used during formal ceremonies where an oath is taken to uphold responsibilities. The judge was sworn into office in a ceremonial event. Pro Tip 2/3Starting Role Indicates the official start of a person's duties in a role or job. She was sworn into the position of treasurer. Pro Tip 3/3Public Trust Highlights the person's commitment to serving honestly and fulfilling public trust. The officers were sworn into duty before the community.