Godan verb with 'ru' ending, Transitive verb
to divide; to separate; to partition; to demarcate; to delimit; to mark off
グラウンドは白線で3つに区切られている。The playground is divided into three areas by white lines. to punctuate; to mark off (with a comma); to insert pauses (between words or phrases when reading aloud); to space one's words
Also written 句切る【くぎる】