1. A brief, short-lived competition or conflict between two or more parties that does not last long
The fleeting rivalry between the two companies ended when one was acquired.
A rivalidade fugaz entre as duas empresas terminou quando uma foi adquirida.
2. A temporary sense of competitive tension or opposition that quickly fades away
Their fleeting rivalry during the tournament was soon forgotten after the final match.
A sua rivalidade fugaz durante o torneio foi logo esquecida após a final.