noun
Refers to a person legally responsible for a child or someone under care, such as a parent or legal guardian. In school contexts, it typically means a parent or guardian.
明日は保護者会があります。
There is a parents' meeting tomorrow.
未成年の方は、保護者の同意が必要です。
Minors need the consent of a guardian.
後見人 is a legal term for a guardian appointed by a court, whereas 保護者 is a broader term that includes parents and other caregivers.
Compound of 保護 (ほご, 'protection') and 者 (しゃ, 'person'). The meaning is transparent from its components.