Pageview is defined as a view of a page on your site that is being tracked by the Analytics tracking code. If a visitor hits reload after reaching the page, this will be counted as an additional pageview. If a user navigates to a different page and then returns to the original page, a second pageview will be recorded as well.Unique Visits is no any term I had hear before associated with Analytics,there is another term is Unique Visitor which is, Unique Visitors represents the number of unduplicated "counted only once" visitors to your website over the course of a specified time period. A Unique Visitor is determined using cookies.
Page views are the number of times any given site page is looked at (visited) by all users. On the other hand, unique visitors numbers report how many different visitors visited your site pages. For example, if your aunt checks out your Website 13 times in one day, she will only show as one unique visitor but she would contribute 13 page views to your reports.
Page views is no.of times a page have been viewed by the user. and Unique visit is how many new visitors come to your site. Which is the count of unique IP