This is the 10689th most frequent Turkish word.
cümle
Sentence.
Here, 'cümlede' refers to the sentence as in a unit of words used to communicate an idea.
Bu cümlede geçen kelimenin anlamını bilmiyorum.
I don't know the meaning of the word used in this sentence.
The word 'cümle' is used generically to denote a sentence as a structural form in teaching languages.
Dil öğretiminde doğru cümle kurmak çok önemlidir.
Forming correct sentences is very important in language teaching.
In this sentence, 'cümle' is describing a specific sentence in a book that has a notable trait of length.