Hyperlordosis is a condition where the spine curves inwards. You will often hear this condition called swayback and it only occurs in the lower spine.
Hypolordosis means a reversal of the normal spinal curvature, and cervical refers to the neck, so cervical hypolordosis would mean the neck is not curved properly. The human spine in profile from the side looks somewhat like an S. This reversal can be due to trauma, or more commonly, due to degenerative conditions, such as aging or arthritic changes.
Mild loss of the lumbar lordosis is probably a result of spasm of the low back muscles (called paraspinal muscles). Lordosis is the normal curvature of the lumbar spine (the part of your spine in your low back. A lumbar lordosis usually curves so that the concave side faces your back and the convex side faces your front. With poor biomechanics, muscle spasm, or some injuries you can lose this natural curve. A loss of lumbar lordorsis is refered to as alordosis or hypolordosis. This by itself is generally not considered an indication for surgery. You may be able to restore your lordotic curve with some chiropractic techniques like Chiropractic Biophysics or Pettibon.
If you look at someone from the side, you notice that the spine is shaped a little like an "S"... The low portion of your back is called the lumbar area. What the above means is that the lumbar area of this "S" shape in straightened --or flattened-- thus producing a straightened lower spine... It usually occurs with back spasms, but maight not really be important... The spine is shaped like this to allow better balancing for standing.