The direction of a vector is the direction along which it acts.
It has a certain magnitude.
For example, we say 10 N force in the east.
Here, 10 N is the magnitude and towards the east is the direction.
The direction is specified using a unit vector.
Let n be a unit vector along a certain direction and #A# be some scalar, then a vector with magnitude that of #A# and direction that of n is defined as,
A = #A# n