incircle in English dictionary incircle Meanings and definitions of "incircle" (geometry) The circle within a triangle that is tangent to all three sides. The incentre is the center of this circle. noun (geometry) A circle within a polygon, especially a triangle, that is tangent to each side. verb Archaic form of [i]encircle[/i]. the circle within a triangle that is tangent to all three sides more Grammar and declension of incircle incircle ( plural incircles) incircle (plural incircles) incircle (third-person singular simple present incircles, present participle incircling, simple past and past participle incircled) more Images with "incircle" Sample sentences with "incircle" Declension Stem Try again Available translations Cantonese Chinese French German Greek Hungarian Irish Italian Japanese Korean Kurdish Kurmanji Paite Chin Polish Portuguese Swedish Tamil Vietnamese Welsh Authors