sanitary UK /ˈsænɪt(ə)ɹi/US /ˈsænɪˌtɛɹi/adjective 2noun 1forms 3 adjective2 •Of or relating to health. •Clean and free from pathogens; hygienic. noun1 •Sanitary towel.When I made evening rounds, I saw women with their hair rolled, using the sanitaries for rollers. — 1996 formssanitaries · more sanitary · most sanitary