1. complete an action to the end, usually indicating a great length
go all the way down/across/over
If you 'go all the way', you reach the end of something, whether it is a journey or a task. When you add prepositions like 'down', 'across', 'over', you indicate the direction it takes to reach the end. when you go 'all the way' you reach the maximum and cannot go any further. These are popular phrasal verbs in social or professional contexts.