I got into a disagreement with someone about the meaning of the word "fourfold." His contention is that it means up to four times as many whereas my contention is that it means four times as many, no less and no more.
I then provided these references to the definitions:
1 : being four times as great or as many 2 : having four units or members
1: Four times as great or as numerous:
To which, he responded that the very first definition, "Being four times as great or as many" means, "Being four times as great or as many as four times."
I'm virtually certain it means, "Being four times as great or being four times as many."
Who's right and how do you explain the grammatical differences of the definition?