1) Ben sira 2) Book 3) Sirach 1) Sirach 
• (n.) A book of the Apocrypha.
deuterocanonical biblical work (accepted in the Roman Catholic canon but noncanonical for Jews and Protestants), an outstanding example of the wisdom ... [2 related articles]
Ec·cle`si·as'ti·cus noun [ Latin ] A book of the Apocrypha. 
Ecclesiasticus is a book placed by Protestants and Jews among the apocryphal scriptures. The author calls himself Jesus the son of Sirach. Originally written in Hebrew, it was translated into Greek by the author's grandson in the 2nd century BC.
Ecclesiasticus 1. A book of the Apocrypha; also called, Wisdom of Jesus, the Son of Sirach. 2. An Apocryphal book mainly of maxims or proverbs. The Apocrypha includes the biblical books in the Roman Catholic Vulgate Bible and has been accepted in the Roman Catholic and Orthodox canon (body of ecclesiastical law); but it is considered noncanonical...