illusion n illusion f → We have an illusion of freedom. to be under the illusion that ... nourrir l'illusion que ... → I was under the illusion that she was meant to help me. to have no illusions about sth ne se faire aucune illusion sur qch Nobody has any illusions about winning the war. Personne ne se fait aucune illusion sur l'issue favorable de la guerre. to give the illusion of sth
(=impression) donner l'illusion de qch → Mirrors can give the illusion of extra space. → The way she dressed gave the illusion that she was slim.
n illusion f d'optique