Some definitions of literary devices, techniques and style from searching via http://www.ferretsoft.com/

LITERARY DEVICES http://mrbraiman.home.att.net/lit.htm

Literary devices refers to any specific aspect of literature, or a particular work, which we can recognize, identify, interpret and/or analyze. Both literary elements and literary techniques can rightly be called literary devices. Literary elements refers to aspects or characteristics of a whole text. They are not “used,” per se, by authors; we derive what they are from reading the text. Most literary elements can be derived from any and all texts; for example, every story has a theme, every story has a setting, every story has a conflict, every story is written from a particular point-of-view, etc. In order to be discussed legitimately, literary elements must be specifically identified for that text. Literary techniques refers to any specific, deliberate constructions of language which an author uses to convey meaning. An author’s use of a literary technique usually occurs with a single word or phrase, or a particular group of words or phrases, at one single point in a text. Unlike literary elements, literary techniques are not necessarily present in every text. Literary terms refers to the words themselves with which we identify and describe literary elements and techniques. They are not found in literature and they are not “used” by authors.

Allegory: Where every aspect of a story is representative, usually symbolic, of something else, usually a larger abstract concept or important historical/geopolitical event. Lord of the Flies provides a compelling allegory of human nature, illustrating the three sides of the psyche through its sharply-defined main characters. Antagonist: Counterpart to the main character