QUESTION: What do you mean by Blank Verse?
ANSWER: Blank Verse is prosody. This term is limited to unrhymed iambic pentameter. This meter has been used in Shakespeare's plays, in Melton's Paradise Lost, and in all the best dramatic poetry.
Example:  Come you spirits
That tend on mortal thoughts, unsex me here
And fill me from the crown to the toe top full
Of direst cruelty [Macbeth: Shakespeare]
 Why do I yield to that suggestion
Whose horrid image doth unfix my hair
And make my seated heart knock at my ribs
Against the use of Nature?