In Macbeth, in Act I scene 2, how does Ross describe Macbeth?
I am afraid your question didn't make much sense - no "terms" are given to describe the post of the Thane of Cawdor. So I have changed it to refer to what I think you were talking about, which is how Ross describes Macbeth in the battle against the Thane of Cawdor. What is important to realise in this scene is that we still have not met Macbeth himself - we are only given information about him by others. We have just seen the wounded Captain stress how bravely both Macbeth and Banquo have fought. He said they fought:
As cannons overcharg'd with double cracks
This description clearly stresses their bravery and how valiant they were.
Now let us focus on how Ross describes Macbeth's efforts. He reports how Norway and the Than of Cawdor were winning in the battle, until Macbeth came along. Note how he describes Macbeth as "Bellona's bridegroom." Bellona was the goddess of war, and so describing Macbeth as her husband clearly gives him great status in warfare. Let us also see how Macbeth won the battle. We are told that Macbeth met the Thane of Cawdor and:
Confronted him with self-comparisons,
Point against point, rebellious arm 'gainst arm,
Curbing his lavish spirit: and, to conclude,
The victory fell on us.
Macbeth, with his skill in warfare and bravery, turns the tide of the battle and wins it for Scotland and his King. We as an audience are presented with a noble, valiant man who is loyal to his King, and yet also shows himself to be war-like and bellicose in his actions - perhaps hinting at a personal weakness that the witches come to exploit in the rest of the play.