It is important not to confuse Entrances with Entrance Page or Landing Page.
Entrances are the number of pageviews for the first page a visitor “lands on” when visiting a website (a metric). In other words, it is the number of time that particular page was the first page viewed on the session.
Entrance Page and Landing Page is the same, the first page a visitor lands when visiting your website (a dimension). In other words, the Landing Page will give you the actual URL of the first page viewed during a session.