Definitions

1. adjective

relating to a catechism; used in teaching or instructing

“The catechismal teachings were carefully structured for young students.”

2. noun

a catechism; a book or manual used for instruction or teaching

“The catechismal texts were popular among the clergy.”

3. adverb

in a manner of a catechism; instructively or didactically

“She lectured catechismally, explaining each concept carefully.”