What is Ordinary Care?

Legal Definition
Such as a person of ordinary prudence, according to the standard of the usual and general experience of mankind, would exercise in the same situation and circumstances. See 98 Mo. 74, 14 Am. St. Rep. 617, 11 S. W. 310.
-- Ballentine's Law Dictionary
Legal Definition
a term for the degree of diligence a person must exercise to avoid injuring other people.