A recent DWT post about hyphen use (Chocolate covered or Chocolate-covered) prompted a discussion about the use of a period with the titles Mr. and Mrs. 1A title used before a surname or full name to address or refer to a man without a higher or honorific or professional title. ' Mr Robert Smith'. More example. " Mr Tom" in British English- Are you sure of that? Or you just think you are correct? " Mr." is the abbrivation of " mister " and all abbrivations by rule. In American English, Mr. Archaic words have a charm that never fades away, from French sounding to wondrously mysterious ones. Bookmark Bookmark and enable e-mail notification. One of the mysteries of the English language finally explained. Fowler's Modern English Usage BE says not to use the dot, and the Oxford Dictionary of English does not use a dot for Mr or Mrs, but does for Prof. However having said that, there are as many exceptions and different styles regarding abbreviations--what to abbreviate, what not to, and where to put the periods--as there are publishers, it seems. Past Tense und Present tense? NATO and DOJ — Department of Justice. Warum wird aus der -ing Form manchmal ein -in'? Antwort von renegade2k I usually get my letters addressed to Mrs XXX and my husband to Mr xxx therefore I guess it is more common to leave the dot. In Canada, the rules are evidently different, and they may well be different in the United States as well.