The Turkish champions lost 3-0 in the first leg in Madrid, and while Terim is anticipating a tough encounter in Tuesday's second leg, he has promised that his side will give its all in Istanbul.
"Anything is possible in football, but when you are playing against Real Madrid things are not so easy," Terim told reporters. "Galatasaray will try everything. I am sure about the ambition and enthusiasm of my players. We have prepared ourselves for any kind of result.
"Real Madrid are one of the best teams in the world. We wanted to play football against Real Madrid and we did so. I believe we will play an entertaining game in front of our fans.
"The result will not be important. Galatasaray's targets never change. If there is a target, then Galatasaray try to achieve it."
The Turks will be without star striker Burak Yilmaz due to suspension, and Terim acknowledged that the former Trabzonspor forward's absence is a big blow. His eight goals are second most in the competition to Cristiano Ronaldo's nine.
"We have lost one of the most important players of Champions League," Terim said. "Today I gave a special permission for Burak Yılmaz to rest, because he will do special training tomorrow. He has not rested since the start of the season so he deserved it."