Real Dictionary

write
verb: If someone writes that something is the case, they say it in a letter, book, or article.
verb: If you write something such as a book, a poem, or a piece of music, you create it and record it on paper or perhaps on a computer.
verb: If you write to a computer or a disk, you record data on it.
verb: Someone who writes creates books, stories, or articles, usually for publication.
verb: When someone writes something such as a receipt or a prescription, they put the necessary information on it and usually sign it.
verb: When you write something on a surface, you use something such as a pen or pencil to produce words, letters, or numbers on the surface.
verb: When you write to someone or write them an email or a letter, you give them information, ask them something, or express your feelings in an email or letter. In American English, you can also write someone.

write in American English
to form or inscribe (words, letters, symbols, etc.) on a surface, as by cutting, carving, embossing, or, esp., marking with a pen or pencil
intransitive verb: to trace or form characters, words, etc., with a pen, pencil, or other instrument or means, or as a pen or the like does
transitive verb: to trace or form (characters, letters, words, etc.) on the surface of some material, as with a pen, pencil, or other instrument or means; inscribe

write in British English
verb: to draw or mark (symbols, words, etc) on a surface, usually paper, with a pen, pencil, or other instrument