This is a great article on flash fiction, which includes a definition along with helpful hints. This is well worth reading. Enjoy!
By Becky Tuch
Flash Fiction: Stories under 2,000 words. Seems easy enough, right? Just get rid of rambling digressions, eliminate flashbacks, cut extraneous descriptions and presto! Mini-fiction nuggets!
Actually, there’s a lot more to flash fiction than one might initially realize. Part poetry, part narrative, flash fiction–also known as sudden fiction, micro fiction, short short stories, and quick fiction—is a genre that is deceptively complex. At the same time, writing these short shorts can be incredibly rewarding. Distilling experience into a few pages or, in some cases a few paragraphs, forces writers to pay close attention to every loaded conversation, every cruel action, every tender gesture, and every last syllable in every single word.
Read the whole article here: http://www.thereviewreview.net/publishing-tips/flash-fiction-whats-it-all-about