Definition of Remiss: Remiss (adjective): Lacking care or attention to duty; negligent. Synonyms: negligent, careless, neglectful, lax Antonyms: diligent, careful, attentive, conscientious Memory Tip: Think of “remiss” as “miss”—missing the care or attention needed. Conversation and Short Story Examples Here is how “remiss” can be used in a casual conversation: John: Did you finish the…