Definition of 入れ子 (いれこ)

noun
1.
nest (of boxes), nesting
2.
concealed information
3.
adopting a child after one's own has died, child adopted in this manner(only relevant for 入れ子)
4.
cavity in an oar (fitted onto a peg as part of a traditional oarlock)
See also:櫓杭
Other readings:
入れ籠【いれこ】
Related Kanji
enter, insert
child, sign of the rat, 11PM-1AM, first sign of Chinese zodiac
basket, devote oneself, seclude oneself, cage, coop, implied