(http://imageshack.us/photo/my-images/827/gap1l.jpg/)
(http://imageshack.us/photo/my-images/848/hookanatfr1.jpg/)
American anglers use the term "Gap" instead of "Gape". The "Gap" on an eyed hook however, is this;
(http://imageshack.us/photo/my-images/716/hookgap1.jpg/)
and there should not be one! Or only a very very small one.
Reversed means that the hook point and bend are offset = bent out to the right. Kirbed means they are bent out to the left.