What part of speech is the word length?

The word "length" can be several parts of speech, depending on how it's used in a sentence. Here are some examples:

* Noun: "The length of the rope was ten feet." (Refers to the measurement of something)

* Adjective: "We took a length walk in the park." (Describes the walk as being long)

* Verb: "The days are lengthening as we approach summer." (Means to become longer)

Therefore, to determine the part of speech of "length," you need to consider its function in the sentence.