Definition of 'mental defective'. Word Frequency. mental defective (ËmÉntÉl dÉªËfÉktÉªv) noun. old-fashioned. a person who suffers from a learning disability or from some form of mental illness. 'You must not say anything,' I enunciated slowly, as if speaking to a mental defective.
How to Measure. To measure your horse, have him stand square on a level surface. Hold the tape or stick so it is perpendicular to the ground and beside the horse so it is even with the top point of the horseâs withers. If you are using a proper measuring stick, lower the bar so it meets the top of the horseâs withers.
Horse Facts: Height. 1  Horses height is measured in units known as hands.. 2  A horse is usually considered to be 14.2 (14 hands, 2 inches) or taller when mature. 3  Anything under 14.2 when mature is usually considered to be a pony. 4  We have a more detailed article on horse height here.