A three sided figure with equal dimensions.

It sides are usually marked with ticks to represent the perfect equality it represents.
"She, the equilateral triangle, is so perfect she's my bae" said Cole.
The equilateral triangle lives live at 60 degrees.
by celestial143 May 25, 2014
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Pretty much the answer to all questions, known and unknown.
Teacher: "Does anyone know why the forces on this triangle with the angles of 49, 49, 82, are similar?"
Dumbass Student: "EQUILATERAL TRIANGLE!!"
by Wahhhhhhhhhhh Granny October 17, 2006
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A unique modification of a love triangle involving three partners that all love the other two equally.

Due to the fact that there are only two genders (usually), this must involve at least two bi/gay people to be truly equilateral. However, it's possible for three of the same gender to work, or for all three to be bisexual.
Dude, did you hear? Bill, Jenn, and Michelle are forming an equilateral love triangle!

Bill, that lucky bastard...
by shadeslayr May 24, 2010
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