REMISS Meaning of REMISS in English a. 1.Slack, dilatory, slow, backward, behindhand, tardy, lax, languid.2.Inattentive, negligent, careless, thoughtless, heedless, neglectful, lax, slothful, slack, slow, dilatory. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012