mem ‧ o /ˈmeməʊ $ -moʊ/ BrE AmE noun ( plural memos ) [countable]
[ Word Family: noun : ↑ memorial , ↑ memory , ↑ memo , ↑ memoir , ↑ memorabilia , ↑ memorandum ; adjective : ↑ memorable , ↑ memorial , ↑ immemorial ; verb : ↑ memorize , ↑ memorialize ; adverb : ↑ memorably ]
[ Date: 1700-1800 ; Origin: memorandum ]
a short official note to another person in the same company or organization:
I sent him a memo reminding him about the meeting.
memo to/from
a memo from the managing director to all heads of department