Added 6 October 2026 abcs noun Categories: Mind & IdeasRare Words noun ! Definition from WordNet 3.1, Princeton University. More about abcs at Wordnik → Where our words come from → The elementary stages of any subject (usually plural). he mastered only the rudiments of geometry Related Words: basicsrudimentsessentialsfundamentalsbbiprimercbaeacagenciesbeia.b.c.absey Back to today's word