Meter in Poetry

Two classifications of poetry: open forms; closed forms.

A closed form (traditional poetry), cadence groups form a pattern.
An open form (free verse, mainly), cadence groups do not form a set pattern.
Poetry in open forms tends to stress meaning over versification.

Syllables: individual units of rhythm in a word or line.

Stress: this class. Also, the emphasis placed on a syllable in a word.

Unstressed: lighter stress, not so heavy as the stress above.

Metrical feet:
1-foot = monometer
2-foot = dimeter
3-foot = trimeter
4-foot = tetrameter
5-foot = pentameter (the meter used in sonnets and blank verse lines; very common)
6-foot = hexameter
7-foot = heptameter
8-foot = octameter
9-foot = nonameter
10-foot = decameter

2 Syllable Feet:

Iambic: stress is on the second of two syllable words: ex. reTURN, beCAUSE, atTACK, etc.
Trochee: reverse of the Iambic, stress is on the first of two syllables: MOTHer, SISter, BORing.
Spondee: Both syllables are stressed.

3 Syllable Feet:

Anapest: stress is on the last syllable of a three syllabled word. Ex. Chevro-LET, rockandROLL

Dactyl: stress on first syllable followed by two non stressed. Ex. BU-da-pest, FOR-tu-nate

Caesura: (plural: caesurae) a pause separating cadence groups (however brief) within a line. If the pause is a result of the end of a line pause, then this is end-stopping.

Enjambement (enjambment): If a line has no punctuation at the end and runs over to the next line, it is called run-on or better yet, enjambement (enjambment).