This word really describes the overall feel and playability of the instrument but for the purpose of this page it is used to describe the height of the strings above the frets.

Different styles and levels of attack on the strings contribute to how low they can go. It may be just a tweak of the truss -rod or cut the nut slots a tad deeper or adjust at the bridge/saddle, there are many reasons and possible cures for a painfully high (or annoyingly low) action.