Definition
'Sure' means being confident and without doubt about something. It implies a strong belief or conviction. Unlike being uncertain or hesitant, 'sure' suggests a state of reassurance. Think of being 'sure' that you studied hard for a test. It conveys a sense of reliability and predictability. A 'sure' thing is something that is almost guaranteed to happen. It can also mean stable and firm, like a 'sure' footing on a slippery slope.