Is the sentence a sea of green trees simile?

Yes, the sentence "a sea of green trees" is a simile, although an implied one.

Here's why:

* Simile Definition: A simile is a figure of speech that compares two things using the words "like" or "as".

* Implied Simile: In this case, the comparison is implied. The phrase "a sea of green trees" evokes the image of a vast expanse of water, much like a sea. This comparison is not explicitly stated using "like" or "as", but it is still present.

Therefore, while not a traditional simile, the sentence "a sea of green trees" functions as an implied simile, creating a vivid image by comparing the trees to a sea.