Correction & Explanation:
1. "Tell more about the subject" → "explain more about a subject"
- "Explain" sounds more natural in this context. "Tell more" is usually used in casual speech, but "explain" fits better when discussing word meanings.
2. "Should I use it only as" → "should I only use it to mean"
- This small change makes the sentence clearer and more grammatically precise.
Tip:
Your original question is understandable, but when discussing word meanings, it's good to use "to mean" instead of "as", since you're asking about definitions rather than functions.