同どう窓そうどうそうCommon word›Freq.FrequencyTop 50,000Meanings1noun, noun which may take the genitive case particle 'no'same school graduate; fellow alumnusRefers to the relationship of having graduated from the same school, or a person with that relationship. Often used in the phrase 同窓会 (alumni reunion).彼かれは私わたしの大だい学がくの同どう窓そうです。He is a fellow alumnus of my university.