Difference between Full stop (UK) and Full stop (U.S.)

full stop (UK)—

1. punctuation mark used at the end of a sentence:

• I remember sitting in class, repeating after the teacher—full stop, capital letter.

2. is used as an interjection to terminate a phrase with finality and emphasis:

• In fact, anything nuclear-related scares me, full stop.

3. a complete stop (as of traffic, etc.):

• The horse then … made a full stop, and expressed an unwillingness to proceed any farther.

full stop (U.S.)— = full stop (UK) 3:

• Despite the lack of any visible traffic, Sam made a full stop at the intersection and then turned north.