0 to stop and catch something or someone before that thing or person is able to reach a particular place:
1 to stop or catch something or someone that is on the way from one place to another so that it does not reach the intended place:
2 to stop things, people, etc. as they go to a particular place:
Police intercepted a boat carrying over a million packs of cigarettes into the country illegally.
to intercept calls/communications/emails
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.