يقتدر بها على التعبير عن المقصود بلفظ فصيح
Through it, the speaker becomes able to express the intended meaning in fasih wording.
The definition contains 3 elements:
1. An intended meaning must be present.
2. The speaker must actually possess expressive capacity.
3. The expression must be in wording that satisfies the requirements of fasaha.
Knowing the idea alone is insufficient if one cannot express it competently. On the other hand, mere verbal fluency without a discernible intended meaning does not capture the definition either.