grandaunt; great-aunt
Refers to the sister of one's grandparent. The kanji 大叔母 is more common, while 大伯母 is a variant.
My grandaunt will turn 90 this year.
I received old photos from my great-aunt.
おば means 'aunt' (parent's sister), while おおおば means 'grandaunt' (grandparent's sister).
大叔父 is the male counterpart, meaning 'granduncle' or 'great-uncle'.
Standard kanji spelling for a grandparent's sister.
Variant kanji spelling; 伯母 typically refers to a parent's older sister, but here it is used for a grandparent's sister.
Compound of 大 (おお, 'great') + 叔母 (おば, 'aunt'), literally 'great aunt'. The reading おおおば is a straightforward combination of the readings of the components.