真ま夏なつ日びTop 15000MeaningsNoun1. day on which the temperature rises above 30°CKanji used真truth夏summer日sunPitch accentまなつびComposed of真まjust; right; due (east); pure; genuine; true; truthPrefix夏なつ日びhot summer day; day on which the temperature reaches at least 25°CNounExamples1真ま夏なつ日びには屋おく内ないにひっこんで太たい陽ようを避さけるしか手てがないよ。All I want to do during the dog days is stay indoors and keep out of the sun.