Step 1: Understanding the context.
The sentence refers to the various interpretations and shades of meaning associated with the word “philosophy.”
Step 2: Evaluating the options.
(A) Correct — indicates different meanings, which matches “wider” and “narrower.”
(B) Applications are practical uses; not relevant here.
(C) Too vague and informal (“a lot of things”).
(D) Uses are different from meanings; not the intended idea.
Step 3: Conclusion.
Option (A) matches the sentence in meaning and tone.