A long-lasting hairstyle created by chemical treatment that curls or waves the hair. She decided to get a permanent to add some volume to her hair.
A marker or pen with ink that is resistant to water and fading, used for writing on various surfaces. He labeled the boxes with a permanent to ensure the writing wouldn't smudge.
(Mathematics) A function of a square matrix similar to the determinant but with all positive signs. Calculating the permanent of a large matrix is computationally intensive.