Meaning

noun the property resulting from being or relating to the greater in number of two parts; the main part

noun (elections) more than half of the votes

noun the age at which persons are considered competent to manage their own affairs

originFrom Middle French maiorité, from Medieval Latin maiōritātem, accusative of Latin maiōritās, from Latin maior (“greater”). Morphologically major + -ity.

Etymology from Wiktionary, CC BY-SA 3.0