From Latin 'visio' (seeing), from PIE *weyd- — the root behind 'video,' 'idea,' 'wise,' and Sanskrit 'Veda.'
The faculty or state of being able to see; the ability to think about or plan the future with imagination or wisdom; an experience of seeing something in a dream or trance.
From Anglo-French 'visioun,' from Latin 'vīsiōnem' (accusative of 'vīsiō'), meaning 'act of seeing, sight, thing seen,' from the past participle stem of 'vidēre' (to see). 'Vidēre' descends from PIE *weyd- (to see, to know), a root that produced an extraordinary family: Sanskrit 'veda' (knowledge, literally 'I have seen'), Greek 'eidos' (form, shape — source of 'idea'), and Germanic 'wit' (knowledge) and 'wise.' The root's dual meaning of 'seeing' and 'knowing
The PIE root *weyd- (to see) also produced the Sanskrit word 'Veda,' the name for Hinduism's oldest and most sacred scriptures. 'Veda' literally means 'knowledge' — but specifically knowledge that has been 'seen' by the ancient sages (rishis), who were called 'seers' precisely because they perceived divine truth. English 'vision,' Sanskrit 'Veda,' and English 'wise' are all cousins