hikikomoriPronunciation: /hɪˌkɪkə(ʊ)ˈmɔːri/Definition of hikikomori noun (plural same) [mass noun] (in Japan) the abnormal avoidance of social contact, typically by adolescent males. [count noun] a person who avoids social contact. Origin:Japanese, literally 'staying indoors, (social) withdrawal'hikikomori in other Oxford dictionaries Definition of hikikomori in the US English dictionary