Translation of ’at length’

Question

In the expression ”...where we'll be able to chat at length.”, is it possible to use ’en détail’ instead of ’longuement’ ?  My dictionary gives both as possibilities.

Accepted Answer

Hi Frank, 
Although both 'longuement' and 'en détail' can mean 'at length', the choice will depend on the verb you use.
Regarding to chat ( bavarder or discuter), I would say that 'longuement' is the correct word to use.
If the verb had been 'expliquer' the 'en détail' would be correct 
But bavarder en détail doesn't work 
Bonne Continuation !

Answer

There's a difference between the two:longuement -- long in temporal durationen detail -- in depth, in detail: this is more of a thorough chat