二に伸しんにしんMeanings1nounpostscript; PSUsed at the end of a letter to add an afterthought or additional information. Common in formal and personal correspondence.手て紙がみの最さい後ごに二に伸しんとして、近きん況きょうを付つけ加くわえた。At the end of the letter, I added a postscript with recent news.