She said, “Go to Learners Dictionary dot com [=the Web site www.learnersdictionary.com] for more information.”
She arrived at 3 o'clock 'on the dot'. = She arrived 'on the dot of' 3. [=she arrived exactly at 3 o'clock]
We need some extra time to 'dot the i's and cross the t's' on the report.
(..) No, look. There he is, and there's the group of hunters running away from his stench. That ain't nothin' but a bunch of little dots. Sometimes things are more than they appear. Hmm? Forget it. Hey, Shrek, what we gonna do (..)2001 Shrek