Definition of biped in US English:



  • An animal that uses two legs for walking.

    • ‘In an upright biped, like humans and Australopithecines, the head is balanced on top of the spine, whereas in the quadruped like a chimpanzee the head is slung from the front of the spine.’
    • ‘The human skeleton is different for many reasons, including the fact that we are the only habitual biped with upper limbs that are solely dedicated to manipulation and not involved in locomotion.’
    • ‘The open savannas where the earliest bipeds evolved were hot, with little shade, and the effect of the sun would have been severe.’
    • ‘Modern humans are bipeds - we have two feet.’
    • ‘The frogs are important because many scientists think that our slimy green pond brethren can tell the future by being susceptible to diseases that will bedevil us bipeds down the line.’
    • ‘Further changes must have affected the hip bone in later stages, bringing it into line with the structure found in today's human bipeds.’
    • ‘Australopithecus postcranial skeletons demonstrate that these forms were upright bipeds.’
    • ‘It's possible, for example, that early hominids living as bipeds in patchy forests became easier targets for leopards and other predators.’
    • ‘It seems the gorilla was the first biped’
    • ‘Analysis of the pelvis, thigh bone and knee joint indicate that Lucy and her kind walked on two feet, making them bipeds.’
    • ‘But although these early bipeds may have developed a more extensive gestural repertoire, I doubt whether their language began to develop grammatical sophistication until about two million years ago.’


  • Using two legs for walking.

    • ‘They add that these evolutionary fixes do not ward off an array of problems that arise from our biped stance.’
    • ‘Our implementation of dynamic programming is performed in a reduced dimensional subspace of a simulated four-DOF biped robot with point feet.’
    • ‘The ultimate aim of the human evolution is to become ' human ' instead of a well dressed and well armed biped animal.’
    • ‘Our biped ancestor had only to put one foot wrong - and catastrophe - at best a stumble, at worst a broken ankle.’
    • ‘Imagine the primordial fear a competing biped species produces.’


Mid 17th century (earlier ( early 17th century) as bipedal): from Latin bipes, biped- (from bi- ‘having two’ + pes, ped- ‘foot’).