objectivism – An attitude, literary or philosophic, according to which objects are perceived as having an intrinsic value rather than a symbolic one.

occasional poem - Written for a specific occasion. The official output of a poet laureate is usually of this sort. (See also encomium, epithalmium, elegy)

occupatio - (ock-you-PAY-show) Summary mention of something one pretends to be glossing over.

octameter - Line of poetry with eight metrical feet. (See also metre, feet)

octave – Eight-line stanza. Associated with the first eight lines of some sonnet forms.

octet - Same as octave.

octosyllable – An octosyllabic poem is one composed of eight-syllable lines. (See also decasyllable, dodecasyllable, hendecasyllable)

ode - A type of lyric or melic verse, usually irregular rather than uniform, generally of considerable length, and sometimes continuous, sometimes divided in accordance with transitions of thought in a complexity of stanzaic forms; it often has varying iambic line lengths with no fixed system of rhyme schemes and is always marked by the rich, intense expression of an elevated thought, often addressed to a praised person or object. Often consists of three parts, strophe, antistrophe and epode. (See also encomium, epinicion, Sapphic verse, strophe, antistrophe, epode, Pindaric verse)

odeon - A small theatre where music and recital competitions took place.

onomatopoeia - Used to describe a word which sounds like the sound it represents. As in bark or meow.

open couplets - Couplets which use run-on lines to carry an idea on beyond the couplet and into the next line. (See also closed couplet, end-stopped, enjambment)

ottava rima - The form first used in English by Byron in "Don Juan". An eight-line stanza in iambic pentameter with the rhyme scheme abababcc. (See also heroic verse)

oxymoron - (ox-i-MORE-on) Two words used together which are thought of as being contradictory but which in use provide an effect which illustrates a truth. As in cold war. (See also paradox)