unnatural• Father Gannon's laugh seemed forced and unnatural.• It was a vividreminder that descending the water column in a submarine is an unnaturalact.• unnatural acts• Luke's stamplay on her; in the swollenfullness of her lips and the unnatural brightness of her eyes.• unnaturalcolors• In some countries, it's considered unnatural for women with families to want to work outside the home.• Brown spoke out against what he considered the unnaturallifestyles of unmarried couples who live together.• It pushes women into unnaturalshapes and ridiculousposes.• The unnatural state of his early years had been reversed.• The artificial and unnatural were extolled.