Meaning of LO in English

LO

transcription, транскрипция: [ ˈlō ]

interjection

Etymology: Middle English, from Old English lā

Date: before 12th century

— used to call attention or to express wonder or surprise

lo these many years

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.