Definition: "Square face" refers to the position of the clubface relative to the target line at impact (the moment the clubface strikes the ball).
The ideal is to get the clubface to the ball square at impact. Picture a line extending straight forward from the ball on the target line. Now picture a line extending along and out from the clubface (from the heel to the toe and out). If the club is square at impact, those two lines will be perpendicular, forming a right angle.
Compare to closed face and open face.
Also Known As: Square clubface, square at impact
