What is the meaning of Manong?

elder brother; big brother

term of address for an elder brother: big bro

term of address for any man older than the speaker, not necessarily an elderly man: mister

a person of (usually local) Filipino descent

eldest brother

term of address for the eldest brother: big bro

elder brother; big brother

respectful term of address or honorific for a young man or boy or any male older than oneself; mister; bro

term of address for an elderly man; mister

a male elder; old man

Source: wiktionary.org