What is the meaning of Chị?

a female cousin who's descended from an ancestor who is/was an older sibling to yours or your spouse's

a female who's (presumably) slightly older than you or the person you're talking to

I/me, your big sister

you, my big sister

I/me, your female cousin who's descended from an ancestor who is/was an older sibling to yours or your spouse's

you, my female cousin who's descended from an ancestor who is/was an older sibling to mine or my spouse's

I/me, a female who's (presumably) slightly older than you

you, a female who's (presumably) slightly older than me

you, a young-adult woman

you, the high schoolgirl reading this textbook

she/her, that admirable/lovable young-adult woman

Source: wiktionary.org

See also