When I look up a dictionary, the example sentences always use small letters at the beginning of the sentence.
make (a problem, bad situation, or negative feeling) worse: the exorbitant cost of land in urban areas only exacerbated the problem | the forest fire was exacerbated by the lack of rain.
Why not using capital letters in the first letter of "make", "the" and "the" above? Isn't it the rule of sentence?
Or it's just how dictionary does, so there is no need for an explanation?