- plainness - the state of being unmixed with other material; "the plainness of vanilla ice cream"
--1 is a kind of purity, pureness
- perspicuity, perspicuousness, plainness - clarity as a consequence of being perspicuous
--2 is a kind of clarity, lucidity, pellucidity, clearness, limpidity
- plainness - the appearance of being plain and unpretentious
--3 is a kind of appearance, visual aspect
--3 has particulars:chasteness, restraint, simplicity; austereness, severeness; bareness, starkness - homeliness, plainness - an appearance that is not attractive or beautiful; "fine clothes could not conceal the girl's homeliness"
--4 is a kind of appearance, visual aspect
- perspicuity, perspicuousness, plainness - clarity as a consequence of being perspicuous