1.Definition: clearly revealed to the mind or the senses or judgment
"Made his meaning plain", "It is plain that he is no reactionary", "In plain view"
2.Definition: free from any effort to soften to disguise
"The plain and unvarnished truth"
3.Definition: lacking embellishment or ornamentation
"A plain hair style"
4.Definition: lacking in physical beauty or proportion
"A plain girl with a freckled face"
5.Definition: lacking patterns especially in color
6.Definition: not elaborate or elaborated; simple
"Plain food", "Stuck to the plain facts", "A plain blue suit", "A plain rectangular brick building"
7.Definition: not mixed with extraneous elements