Quote:
Originally Posted by riverkid  Nope Sara, 'nail something' means get it right. You can also say; 'be spot on/be right on/ hit the nail on the head/bull's eye/ hit the bull's eye / ...
'nail sth down' means decide on sth, come to an agreement on sth..
Let's get this nailed down then. The plan is to meet ... |
true, also another meaning of Nail sth down is:
nail
sth down (UNDERSTAND) phrasal verb [M] US INFORMAL
to understand something completely, or to describe something correctly:
We haven't been able to nail down the cause of the fire yet.(from cambridge dictionary)