I recently wrote the sentence,
But when you see Iesu, it can either be vocative, dative, genitive, or ablative.
In it, I use "either" to coordinate four different alternatives: vocative, dative, genitive, or ablative. Is this grammatically correct? The Merriam-Webster dictionary supports this use of either, having this to say about it:
3 either (conjunction)
—used as a function word before two or more coordinate words, phrases, or clauses joined usually by or to indicate that what immediately follows is the first of two or more alternatives
- can be used either as a guest room or as an office
It seems to be the case that, as an adjective or pronoun, "either" implies that there are only two alternatives. But as a conjunction, it can join many alternatives. Is my understanding correct? Or has this latter function only come about through consistent misuse of the word?