Changes in the meaning of words or phrases over time?

• A. Semantic Changes
• B. Meaning
• C. Surface Structures
• D. Input Theory

Answer: (A)

Semantic change is the process by which the meaning of a word or phrase shifts over time. This captures how languages evolve as culture, usage, and context reshape how speakers understand words. The option that best names this phenomenon is semantic change because it specifically describes the evolution of meaning across periods. For example, words often drift in nuance: many English words have taken on broader or different senses than they once had, and some have shifted from positive to negative or vice versa (like awful or nice in historical shifts). These shifts illustrate the dynamic nature of meaning itself, not just a current sense or a syntactic structure. The other ideas refer to different concepts: meaning in a static sense, surface structures of sentences, or theories about how learners acquire language, none of which address how word meanings change over time.