Aouchiche has jetted out to Portugal to join his new teammates and take in the last couple of days of the pre-season training camp.
“We’re delighted to welcome Adil to Aberdeen”, said Dons boss Jimmy Thelin. “He’s a technically gifted player who brings creativity and strong attacking instincts to our midfield.
“At just 22, Adil has already played at a high level in France and England. His experience, coupled with his desire to keep improving makes him a really exciting addition to the group and we believe this is a great environment for him to thrive.
“We look forward to working with him over the coming season and helping him make a real impact in a Dons shirt.”
The player said: “It’s a special feeling to sign for Aberdeen.
“The best move for me is to come here. Everyone knows it’s a huge club in Europe and Scotland.
“I had a really positive and important discussion with the manager, and he made me feel like I was wanted here. He wants me to enjoy the loan spell and bring my qualities and experience to the club.
“I will try to bring everything to my team-mates and club. I want to achieve things here and hopefully make some good memories.”