1. simple and without decoration or special features
2. easy to see, hear, or understand; obvious
3. not beautiful or attractive in appearance

1. a large area of flat land with few trees

1. completely; simply
Usage: informal

Examples

• She wore a plain white dress to the ceremony.
• The instructions were written in plain English.
• It’s plain to see that he’s upset about something.
• The house had plain walls with no artwork.
• Buffalo once roamed the Great Plains in huge herds.
• That’s just plain wrong!
• He gave me a plain answer without any excuses.
• The vast plain stretched to the horizon.