The question asks to identify the correct definition of 'homonyms' from the given options.

Defining Homonyms Correctly

Homonyms are words that share the same pronunciation or spelling but have different meanings. Let's analyze the options:

• Option 1: States that morphemes sound different but have the same meanings. This describes synonyms, not homonyms.
• Option 2: States that morphemes sound the same but have different meanings. This is the core definition of homonyms. For example, 'bat' (the flying mammal) and 'bat' (the sports equipment).
• Option 3: Describes affixes or bound morphemes that attach to other words. This is unrelated to the definition of homonyms.
• Option 4: States that morphemes sound the same but have different spellings. This describes homophones (e.g., 'to', 'too', 'two'), which are a *subset* of homonyms but not the complete definition. Homonyms can also share the same spelling (e.g., 'bank' of a river vs. 'bank' for money).

Conclusion on Homonyms

Based on the analysis, the definition that accurately and broadly defines homonyms is that they sound the same but possess different meanings.

Therefore, the correct definition is:

Morphemes which sound the same but have different meanings