Definition of vergence in US English:



  • 1Physiology
    The simultaneous movement of the pupils of the eyes toward or away from one another during focusing.

    • ‘In doing so, they perform saccadic movements, smooth pursuit movements, vergence movements, vestibular movements, and accommodation.’
    • ‘Pure vergence movements, uncontaminated by saccades, occur when changing gaze between two targets, both lying straight ahead, but at different distances.’
  • 2Geology
    The direction in which a fold is inclined or overturned.

    ‘a zone of opposing fold vergence’
    • ‘A foreland fold-thrust belt with a southwestward vergence formed south of the Mazar-Kangxiwar fault.’
    • ‘Major and minor folds with clear vergence relationships change their sense around the Rhoscolyn Anticline.’
    • ‘No structures are present in the Mount King Beds that show vergence.’
    • ‘Previously, there has been disagreement over the direction of obduction of the ophiolite and the vergence of structures.’
    • ‘Fold and cleavage vergence varies across the domain, from SE through neutral to NW, although a majority verge SE.’


1980s: common element of convergence and divergence.