Writing, in the most general sense, is language in the form of letters that make up words that make up sentences, etc... It's verbal communication in a visual form.
Writing can come in many ways and serve many purposes. It can be a book, or a journal, or a letter, or article. Its can be personal or impersonal; formal or informal. It can be informative or persuasive. Artistic and abstract or scientific and realistic. It can be fact or fiction; broad or specific. Writing, in every sense of the word, is expressive. It's a way in which mankind communicates the way they individualistically choose to.
What's great about writing is that it can be done anywhere at anytime. For me, its usually in my room, cozied up on my bed with a laptop, or outside on the deck under a canopy if its a nice enough day...(to be continued?)