actually, wide is quite relative to specific camera ie. crop sensor camera (nikon has 1.5 ratio and canon has 1.6 ratio) and full frame camera. full frame camera didnt multiply your field of view regarding what lens you are attached to the camera. ie. 17mm is always 17mm for full frame camera. but not for crop sensor camera, if you have crop sensor nikon, and you attach 17mm lens to it then your field of view will be multiplied with 1.5 will become 25.5mm field of view. for full frame sensor, 24mm already considered wide.
aside from that, what need to consider is the space compression between foreground (your subject) with the background. wide lens will make all the background appear smaller, opposite to telephoto lens which relatively make your background appear bigger.
fyi, normal lens is around 50mm (space compression that will look like our eyes see)
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