Select the word or phrase which best expresses the meaning of the given word.

Historic means significant in history or important enough to be remembered and recorded. 'Notable' is the closest synonym, meaning worthy of attention or remarkable in a positive sense. The other options (insignificant, unremarkable, dull) are either antonyms or convey lack of importance, which contradicts the meaning of historic.

Step-by-step Derivation:
Etymology and semantic analysis: 'Historic' derives from Latin 'historia' and means events or things of great importance or significance in history. Synonyms include: memorable, important, momentous, notable. Antonyms include: insignificant, unremarkable, ordinary, dull. Among the given options, 'Notable' (meaning worthy of attention, remarkable, important) best matches the meaning of historic.