Final answer:
In sports tournaments, the term 'Bye' is used to refer to an automatic advance to the next round without playing, often due to an odd number of participants or top seeding.
Step-by-step explanation:
The term used to describe an automatic advance to the second round without having to play in a sports tournament is Bye. A bye usually occurs in a bracketed tournament when there are an odd number of participants, or to reward a player or team that has a top-seeding based on performance in previous rounds or related events. This concept is common in many sports including tennis, soccer tournaments, and American football.