Added 10 October 2026 submarginal adjective Categories: Rare Words adjective ! Definition from Wiktionary (CC BY-SA). More about submarginal at Wordnik → Where our words come from → Less than, or worse than, marginal. Not meeting even the minimum standard of quality. Below a margin. Related Words: lunulessubstandardsuboptimalsub-optimalunmarginalless-than-stellarmarginalsubmediocrenonmarginalsubparsubnormal Back to today's word