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abbr. (context mathematics logic English) if and only if; used to show that the truth values of two statements are the same.

Usage examples of "iff".

But the avionics resisted targeting a friendly, now with his IFF on, and that would work in his favor as well.

The Wal-Mart loomed off the highway, and then the trees closed in, and he was getting off iff from holding on to the on Rolling Hills Poad, his shoulders sti int wheel so tightly.

She might have grinned, had she known that the knot of McDonnells had passed muster at the enemy IFF query near Tiran by flawlessly surrogating an Indian Air Force response.

It augmented, rather than replaced, the standard IFF devices which had been in use since before Sassinak joined the Fleet.

Iffen you give mesome of that-there chaw, I might git to talking and I might not try to bite ya.

With his partner, noted painter and up-and-coming fantasy author Robyn Fielder, he was cofounder and codirector of the Iff Theater.

Robinette came up on the assigned frequency, contacted Baghdad, and switched her commercial IFF transponder to the assigned squawk.

It showed the entire Davao Gulf area in extraordinary detail, with IFF data blocks on every American aircraft, and computer-generated data blocks on the Chinese vessels.

There was some of fermented brew made from birch sap, but Ayla decided she drink it, and she was pleased to see a woman coming around Iff hot herb tea into cups for those who wanted it.

If the Thebans had managed to put their prizes' IFF gear back into commission, the mines wouldn't attack without specific commands to do so.

All transmissions from any given shuttle thus carried the same IFF code so the logs could keep track of them with no effort from any human personnel.

Gordon of the IFF, and called Cross Impact Matrix Analysis, it traces the effect of one innovation on another, making possible, for the first time, anticipatory analysis of complex chains of social, technological and other occurrences--and the rates at which they are likely to occur.

For instance, a shipping order for IFF missiles gets tagged into a higher priority slot.

He located the generator controls, steering gear, collective, navigation instruments, lights, trim, IFF detonators, fire extinguishers, flight-path scanners-all where they ought to be and easily grouped for natural interfacing.

Since the escort vessel had tampered with its own IFF transmission, they had had to use other detection methods to figure out its class and armament .