News - August 15, 2016; 2:34 AM ET. After rain caused several rounds of delays and postponements during the first week of the Summer Games, building heat could make for uncomfortable conditions into early this week.
Legal Definition of attorn. : to agree to be the tenant of a new landlord or owner of the same property.
Attn outside of the context of a letter is simply slang for the word attention.. The abbreviation is often used in non-professional internet communications or works of literature that purposefully subvert traditional grammar.