I came across "means" in my studies. Here is excerpt out of my business course book.
For a fax the same rules apply as for a business letter, "only the means of communication is different".
"means" is singular here but a plural noun used with "is different"
Question 1: Do we see "means" always in singular in such context or others ?
Question 2: Would be "only the meanings of communication are different" similar to the use of "the means of communication" ?
Question 3: Can we use "only the mean of communication is different"? Singular
Cambridge Dict. says here: Even though it ends in an ‘s’, means is a singular noun. We use a singular verb with it. We use it to talk about a method of doing something:
The most economical means of travelling to Aberdeen is by plane. (the most economical method or way)
Not: … most economical mean … or … most economical means are …