A sign that does not appear on a house cusp but is wholly contained within a house.  When a sign is intercepted in a house, the opposite sign is also intercepted in the opposite house; consequently we find Cancer intercepted in the eighth house with Neptune in it.

Regarding the influence of interception, we find that when a planet is in an intercepted sign its influence is held in abeyance or latency until by progression it moves out of the intercepted sign. This tendency may be somewhat modified by a strong aspect, or a number of minor or weak ones, but an intercepted planet never has the same power over the life as one that is free.