/ ˈʌpbrɪŋɪŋ; NAmE / noun
[ sing. , U ] the way in which a child is cared for and taught how to behave while it is growing up :
to have had a sheltered upbringing
He was a Catholic by upbringing.
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WORD ORIGIN
late 15th cent.: from obsolete upbring to rear (see up- , bring ).