A Quick and Simple Dictionary

plain

1. Adjective.  (context, now) Flat, level. (defdate, from 14th c.) .
2. Adjective.  Ordinary; lacking adornment or ornamentation; unembellished. (defdate, from 14th c.) .
3. Adjective.  Evident to one's senses or reason; manifest, obvious, clear, unmistakable. (defdate, from 14th c.) .
4. Adjective.  Downright; total, unmistakable (as intensifier). (defdate, from 14th c.) .
5. Adjective.  Honest and without deception; candid, open; blunt. (defdate, from 14th c.) .
6. Adjective.  Simple in habits or qualities; unsophisticated, not exceptional, ordinary. (defdate, from 16th c.) .
7. Adjective.  Not unusually beautiful; unattractive. (defdate, from 17th c.) .
8. Adjective.  (context, of food) Having only few ingredients, or no additional ingredients or seasonings; not elaborate, without toppings or extras. (defdate, from 17th c.) .
9. Adjective.  (computing) Containing no extended or nonprinting characters (especially in (term, plain text) ). (defdate, from 20th c.) .
10. Adverb.  (colloquial) Simply.
11. Verb.  (context, now) To lament, bewail.
12. Noun.  An expanse of land with relatively low relief.
13. Noun.  (obsolete) A plane.