0 a situation in which older and younger people do not understand each other because of their different experiences, opinions, habits, and behaviour: --
She's a young politician who manages to bridge/cross (= understand both groups in) the generation gap.
1 a lack of understanding between older and younger people that results from different experiences of life --
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.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.