circumferencenounfeminine/siɾkũfɨɾˈẽsjɐ/mediumcir·cun·fe·rên·ci·aPortuguesEnglishEspanolFrancaisDefinitionA closed plane curve consisting of all points at a given distance (radius) from a fixed point (center). Also, the length of this curve.They measured the circumference of the tree trunk.The circumference of the circle is calculated using the formula 2πr.synperimetercircuitEtymologyDo latim 'circumferentia'.Related wordscircunferencialcircunferir