(1):

(p. pr. & vb. n.) of Rule

(2):

(n.) A decision or rule of a judge or a court, especially an oral decision, as in excluding evidence.

(3):

(n.) The act of one who rules; ruled lines.

(4):

(a.) Used in marking or engraving lines; as, a ruling machine or pen.

(5):

(a.) Predominant; chief; reigning; controlling; as, a ruling passion; a ruling sovereign.