noun:
A viscount is a title of nobility, ranking below an earl and above a baron. It is often used as a form of address for a man of high social standing. For example, "The Viscount greeted the guests at the ball."
In some countries, viscount is also the name for a member of the middle peerage rank. For instance, "The Viscounts in the House of Lords are debating the changes to the tax code."
In historical contexts, viscount can refer to a deputy or vice-count, as in a count's representative or subordinate. For instance, "The Viscount was in charge of collecting taxes for the count's domain."
As a verb, viscount can mean to confer the title of viscount upon someone. For example, "The king will viscount the duke at the upcoming ceremony."