lapse
noun
an accidental or temporary decline or deviation from an expected or accepted condition or state; a temporary falling or slipping from a previous standard.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
He advocated strict morality, though he admitted having himself been a sad lapser from virtue.
From The Road to Paris by Stephens, Robert Neilson