Poetry written without rhymes, but which retains a set metrical pattern, usually iambic pentameter (five iambic feet per line) in English verse. Since it is a very flexible form, the writer not being hampered in the expression of thought or syntactic structure by the need to rhyme, it is used extensively in narrative and dramatic poetry. In lyric poetry, blank verse is adaptable to lengthy descriptive and meditative poems. An example of blank verse is found in the well-known lines from Act 4, Scene 1 of Shakespeare's The Merchant of Venice:
The qua | lity | of mer | cy is | not strain'd,
It drop | peth as | the gen | tle rain | from heaven
Upon | the place | beneath; | it is | twice blessed:
It bles | seth him | that gives | and him | that takes;
Sidelight: Blank verse and free verse are often misunderstood or confused. A good way to remember the difference is to think of the word blank as meaning that the ends of the lines where rhymes would normally appear are "blank," i.e., devoid of rhyme; the free in free verse refers to the freedom from fixed patterns of traditional versification.
(See also Verse Paragraph)

This definition is in context to Poetry. See more contextual defintions for Blank Verse.