/ ˈdiːdiː; NAmE / noun ( IndE )
1.
an older sister :
Didi taught me how to read.
2.
used after the name of an older female cousin of the same generation
3.
used when speaking to an older female who is not related to you, as a title showing respect :
Didi, could you help me with this bag?
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WORD ORIGIN
from Hindi dīdī .