| Subject | English | French |
| tech. | deviation from flatness of a measuring face | écart de planéité d'une face de mesure |
| tech., met. | flatness defect for the sides of a sheet, camber defect of a sheet | défaut de rectitude pour les côtés d'une feuille, défaut de cambrage d'une feuille |
| tech., mater.sc. | flatness measuring | mesure de planéité |
| commun., el. | flatness of bearing | flou |
| tech. | flatness of field | planéité du champ |
| IT, dat.proc. | flatness parameter | paramètre de platitude |
| forestr. | flatness ratio | indice d'aplatissement |
| tech., law | flatness tolerance | tolérance de planéité |
| el. | gain flatness | égalisation de la courbe de gain |
| met. | hot strip flatness | planéité des bandes à chaud |
| mater.sc., mech.eng. | lack of flatness | defaut de planeite |
| fin. | market flatness | calme |
| fin. | market flatness | lourdeur |
| fin. | market flatness | mollesse |
| fin. | market flatness | stagnation |
| gen. | offended by the flatness of her refusal | offensé par la netteté de son refus |
| industr., construct., met. | out of flatness | déformé |
| industr., construct., met. | out of flatness | ovalisé |
| industr., construct., met. | out of flatness | gauchi |
| industr., construct., met. | out of flatness | ovale |
| tech., law | tolerance on flatness | tolérance de planéité |