What is a blank verse poem

A blank verse is a poem with no rhyme but does have iambic pentameter. This means it consists of lines of five feet, each foot being iambic, meaning two syllables long, one unstressed followed by a stressed syllable.

Blank verse is poetry written with regular metrical but unrhymed lines, almost always in iambic pentameter. It has been described as "probably the most common and influential form that English poetry has taken since the 16th century", and Paul Fussell has estimated that "about three quarters of all English poetry is in blank verse"