Poetic meter is the patterned organization of sound in poetry, establishing a rhythmic framework within or across lines. Different traditions organize this framework through recurring stresses, syllable counts, syllable lengths, or combinations of these features. Meter is therefore not identical to rhythm: rhythm includes the actual movement of speech, while meter describes an underlying pattern against which variations can be heard. The study and description of these structures form part of prosody. (poetry.harvard.edu)
Principal metrical systems
Metrical systems differ in what they count and regulate. In English, the predominant traditional system is accentual-syllabic verse, which organizes both the number of syllables and the placement of stresses. Its regularity does not require every line to reproduce an identical sequence without variation; rather, the pattern remains recognizable across changing verbal rhythms. (poetryfoundation.org)
Accentual verse regulates the number of prominent stresses without fixing the total syllable count. Consequently, the intervals between stresses may contain different numbers of unstressed syllables. Much Old English poetry uses this principle. Syllabic verse, by contrast, regulates syllable totals rather than a recurring arrangement of stresses. A poem may give every line the same count or repeat different counts in corresponding positions within successive stanzas. Marianne Moore’s poetry supplies prominent English-language examples. (english.cam.ac.uk)
Quantitative meter, associated especially with classical languages, organizes patterns of long and short syllables rather than strong and weak stresses. Although terminology overlaps with that of English stress-based verse, the organizing distinction is different. A “long” metrical position in quantitative verse should not simply be interpreted as an emphasized syllable in an English reading. (poetry.harvard.edu)
Feet and line length
In traditional descriptions of English meter, a metrical foot is a small grouping of stressed and unstressed syllables. The most frequently discussed feet are:
- Iamb: an unstressed syllable followed by a stressed syllable, represented as
˘ /. - Trochee: a stressed syllable followed by an unstressed syllable,
/ ˘. - Anapest: two unstressed syllables followed by a stressed syllable,
˘ ˘ /. - Dactyl: a stressed syllable followed by two unstressed syllables,
/ ˘ ˘. - Spondee: two stressed syllables,
/ /.
Iambic and anapestic patterns are conventionally called rising, whereas trochaic and dactylic patterns are called falling. These labels describe the order of relative prominence, not a mandatory change in vocal pitch. (poetryfoundation.org)
A metrical name commonly combines the prevailing foot with the number of feet per line. Dimeter has two feet, trimeter three, tetrameter four, pentameter five, and hexameter six. Thus, iambic pentameter has a framework of five iambic feet, normally yielding ten syllables in its regular form. Merely having ten syllables, however, does not establish that a line is iambic: their rhythmic organization also matters. (poets.org)
Scansion and interpretation
Scansion is the analysis and notation of a poem’s meter. In English verse, it commonly involves identifying syllables, marking relative stresses, grouping them into feet, and recognizing a prevailing pattern. Vertical bars can mark foot boundaries, while ˘ and / indicate unstressed and stressed positions. These marks are analytical conventions, not a complete transcription of the voice. (poetryarchive.org)
The opening line of William Shakespeare’s Sonnet 18—“Shall I compare thee to a summer’s day?”—can be represented as:
shall I | com PARE | thee TO | a SUM | mer’s DAY
This displays its iambic pentameter framework, although an actual performance need not give every marked stress equal force. Scansion distinguishes the recurring structure from the more variable prominence of spoken words. (poets.org)
Interpretation becomes important where natural speech and metrical expectation do not coincide exactly. Different readers may emphasize a phrase differently while still recognizing the same underlying meter. The binary notation of stressed and unstressed syllables simplifies a considerably more graduated range of speech rhythms. (poetry.harvard.edu)
Variation, pauses, and syntax
Metrical verse frequently departs locally from its prevailing pattern. A poet may substitute one foot for another, reverse the opening foot, or vary the expected line length. An initial trochee in an otherwise iambic line is a familiar example. Such changes need not abolish the meter: their effect depends on the listener continuing to recognize the established framework. (poetry.harvard.edu)
Meter also interacts with syntax and phrasing. A caesura is a pause within a line, often associated with punctuation or a grammatical boundary. Enjambment occurs when a sentence or clause continues across a line break. Neither device necessarily changes the prevailing meter, but both influence how its units are experienced: grammatical completion may occur before the line ends or be delayed into the next line. (poetryfoundation.org)
Meter, rhyme, and poetic form
Meter and rhyme are separate organizing devices. Meter patterns rhythmic units; rhyme establishes correspondences between sounds. Blank verse, defined as unrhymed iambic pentameter, demonstrates that regular meter does not require rhyme. Likewise, a stanza organizes lines into a larger unit and may contain lines of different lengths or rhythms. (poets.org)
Free verse does not follow an established, continuously governing metrical plan. This does not mean that it lacks rhythm or deliberate organization. Speech cadences, recurring phrases, pauses, and line breaks can shape its movement, and locally regular rhythmic sequences may emerge without becoming the rule for the whole poem. Its distinction from metrical verse concerns sustained structural expectation, not the presence or absence of patterned sound. (poetryfoundation.org)