adj Simple and without decoration or extra features.
- She wore a plain white dress to the interview.
- I'll just have a plain bagel, no toppings.
- The hotel room was plain, with white walls and a single wooden chair.
adj Clear and obvious.
- It was plain from her expression that she disagreed.
- It was plain that the old bridge could not bear much more weight.
- The mistake is plain to see once you look at the second page.
adj Honest and direct in manner or speech.
- He gave us his plain opinion without sugarcoating it.
- I appreciate her plain speaking; she always tells you exactly what she thinks.
- Give me a plain answer: are you coming to the party or not?
noun A large area of flat land.
- Herds of bison once roamed the great plains.
- The train crossed a vast plain where nothing but grass stretched to the horizon.
- Farmers grow wheat on the fertile plain below the mountains.
