HD wallpapers or high definition wallpapers are usually those that are widescreen and in 1080p. The numbers are simply shorthand identification for the horizontal and vertical lines. This term usually implies a resolution of a width of 1920 pixels and a height of 1080. There are now available free HD wallpapers that anyone can access and download anytime they want. The images are updated daily in many of the websites that provide these wallpapers and some go as far as changing by the day, by the mood, according to the holiday or for any other reason. Most of the images that men download are those of the sexy women in classical or suggestive poses and then there are the more common animal images and such.