Specifically refers to the sacrament of confirmation in Christian denominations.
彼は来月、教会で堅信の秘跡を受ける。
He will receive the sacrament of confirmation at church next month.
Standard kanji spelling for the Christian confirmation rite.
Alternate kanji spelling; less common than 堅信.
From 堅 (firm, steadfast) and 信 (faith, belief), referring to the strengthening of faith in the Christian confirmation rite.