plural of premises, since is already plural

I understand that the word premises is the plural form of the word premise.  Which is odd because they mean nothing at all the same.  Anyways, can the word premises be plural?  Example:  (singular) I visited the premises. (plural) I visited multiple premises.

Thanks in advance

Merriam-Webster Dictionary entry:

Main Entry: ¹prem·ise
Variant(s): also pre·miss /'pre-m&s/
Function: noun
Etymology: in sense 1, from Middle English premisse, from Anglo-French, from Medieval Latin praemissa, from Latin, feminine of praemissus, past participle of praemittere to place ahead, from prae- pre- + mittere to send; in other senses, from Middle English premisses, from Medieval Latin praemissa, from Latin, neuter plural of praemissus
1 a : a proposition antecedently supposed or proved as a basis of argument or inference; specifically : either of the first two propositions of a syllogism from which the conclusion is drawn b : something assumed or taken for granted : PRESUPPOSITION
2 plural : matters previously stated; specifically : the preliminary and explanatory part of a deed or of a bill in equity
3 plural [from its being identified in the premises of the deed] a : a tract of land with the buildings thereon b : a building or part of a building usually with its appurtenances (as grounds)

That is quite all right.  No apologies necessary.  Some of my employees still argue with me that since premises is the plural form, premise therfore should mean a single property.  A new spin on this ongoing debate is if premises is already in plural form, what is the plural form?  I guess then it could be used as plural as well.  As in the example of  s. fish pl. fish and s. deer pl. deer.

Hi Hookster,

You said:

I totally agree with you.