To make amends or reparation for; atone for.
Expiate one's sins by acts of penance.
To make amends or reparation for (wrongdoing or guilt); atone for.
To make amends; atone.
To pay the penalty of; suffer for.
To expiate is defined as to admit you did something that was a sin or something you feel guilty about and to pay a penalty.
When you feel guilty about a lie you told, and you come clean and ask for forgiveness, this is an example of a time when you expiate.
To purify with sacred rites.
Origin of expiate
Latin expiāre expiāt- ex- intensive pref. ex– piāre to atone (from pius devout)