IPA: /ˈmʌltiˌeɪdʒ/
KK: /ˈmʌltiˌeɪdʒ/
Relating to or involving multiple age groups.
The multiage classroom allows students of different ages to learn together.
Multiage → It is formed from "multi-" (meaning many) and "age" (from Old French *age*, meaning a period of time or a stage in life). The word "multiage" refers to a situation or environment that includes many different ages or stages of life.
Think of 'many' ('multi-') different 'ages' — that's what multiage means, a mix of various stages in life.