The appositive in the sentence "Our neighbor, Mrs. Eddy, is an editor" is "Mrs. Eddy". An appositive is a noun or noun phrase that renames or provides additional information about another noun in the sentence. In this case, "Mrs. Eddy" is the appositive as it renames or provides more information about the noun "neighbor". To find the appositive, you can ask yourself which part of the sentence is giving more detail or renaming the noun in question.
