plain
13 synonyms and 0 antonyms for plain, grouped by meaning and by how common each one is.
Adj — Simple and without decoration or extra features.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
How to use plain
The word patterns that sound natural to a native speaker.
Etymology
From Latin planus, "flat, level," via Old French plain — a doublet of "plane," "piano," and "llano."
Full origin of plain →Frequently asked questions
What does “plain” mean?
The word “plain” means simple and without decoration or extra features. In plain terms, simple, undecorated, or obviously clear — or, as a noun, a stretch of flat open land.
How do you pronounce “plain”?
“Plain” is pronounced playn (/pleɪn/ in IPA).
How do you use “plain” in a sentence?
Here is “plain” used in a sentence: “She wore a plain white dress to the interview.”
What part of speech is “plain”?
Depending on how it is used, “plain” can be an adjective and a noun.
Where does the word “plain” come from?
The word “plain” comes from Latin. From Latin planus, "flat, level," via Old French plain — a doublet of "plane," "piano," and "llano.".
Is “plain” a common word?
“Plain” is a fairly common word in modern English, usually learned at around the B1 level.
How many meanings does “plain” have?
“Plain” has 4 distinct senses listed in this dictionary. The most common is: simple and without decoration or extra features.
What is the difference between plain and plane?
Plain and plane sound identical but differ in meaning. Plain means simple and undecorated, or a large flat stretch of land. Plane refers to a flat surface, an aircraft, a carpenter's smoothing tool, or a tall tree. Remember: a plain is grassy, while a plane flies.
What is the opposite of plain?
In the sense of undecorated, the opposite of plain is fancy, ornate, elaborate, or decorated. When plain describes something ordinary, opposites include striking or eye-catching; when it means clear and simple, an opposite might be complicated. The right antonym depends on which sense you mean.
Does plain mean boring?
Not necessarily. Plain often carries a neutral or positive sense of clean simplicity — plain design can look elegant and uncluttered. It can shade toward 'dull' or 'unremarkable' in some contexts, but frequently it just means without decoration, straightforward, or honest, as in plain speaking.