1
plain
/ˈpleɪn/
adjective
plainer;
plainest
plainer;
plainest
Britannica Dictionary definition of PLAIN
[also more plain; most plain]
1
:
having no pattern or decoration
-
Her dress was plain.
-
a plain fabric
-
It was a plain room with no curtains.
-
She was wearing plain black shoes.
-
He printed the picture on plain paper.
2
:
not having any added or extra things
-
a glass of plain [=pure] water
-
a piece of plain chicken
-
plain yogurt
-
You don't have to call me Mr. Johnson—just plain Fred will be fine.
-
(Brit) The recipe calls for 250 grams of plain flour. [=(US) all-purpose flour]
3
:
easy to see or understand
-
It's plain to see [=it's obvious] that you don't like dogs.
-
You should have made it plain [=clear] to us what you were planning to do.
-
What he said is a lie, plain and simple.
-
The evidence makes it plain [=clearly shows] that he is guilty.
-
The answer is (as) plain as day. = The answer is as plain as the nose on your face. [=the answer is very obvious]
5
always used before a noun
:
complete and total
-
His motive was plain [=pure, sheer] greed.
-
The lawyer stated the plain facts of the case.
-
Her story is the plain truth.
6
:
not unusual or special in any way
:
ordinary
-
We're just plain, hardworking people.
-
plain common sense
-
(US) I'm just a plain old country boy.
-
(US) All kinds of people attended the event, including politicians, celebrities, and just plain folks. [=ordinary people]
7
:
not handsome or beautiful
in plain sight
chiefly US
or
in plain view
:
in a place that is easily seen
plain clothes
:
the ordinary clothes of a police officer who is not wearing a uniform
—
see also plainclothes
— plainly
adverb
-
The camp is for kids who like sports, which he plainly [=obviously, definitely] does.
-
The star was plainly [=clearly] visible in the sky toward the north.
-
The book states quite plainly [=openly, simply] that he was part of the plot.
-
She always dresses plainly.
— plainness
noun
[noncount]
2
plain
/ˈpleɪn/
noun
plural
plains
plural
plains
Britannica Dictionary definition of PLAIN
[count]
:
a large area of flat land without trees
3
plain
/ˈpleɪn/
adverb
Britannica Dictionary definition of PLAIN
informal
:
truly or completely
—
used to make a statement or description more forceful