The sentence has no mention of a meeting, but whatever it is, there will be only one of them in July.iffy
2. not certain to happen
The July date is still rather iffy.
That means that there is only one meeting planned for July, am I right?
If I change the sentence a bit:Yes, that's true. 'July' is an adjective. If we omit it: "The date is still rather iffy." We see that "The" is a demonstrative adjective/determiner, and means "That", i.e. "the one we have previously mentioned."
A: "The next three meetings will be June 7th, July 15th and August 2nd. Are they OK with you?"
B: "I'm happy with the June and August dates but the July date is still rather iffy. I'll let you know when things firm up."