cubiclenoun [ C ]
uk/ˈkjuː.bɪ.kəl/us/ˈkjuː.bɪ.kəl/a small space with walls or curtains around it, that is separate from the rest of a room and where you can be private when taking clothes off, etc.:
a shower cubicle
I was getting undressed in one of the cubicles.