1694 August 9, James Drummond, 4th Earl of Perth, Letter XII, in 1845, William Jerdan (editor), Letters from James, Earl of Perth, Lord Chancellor of Scotland, &c, to His Sister, Countess of Erroll, and Other Members of His Family, page 40,
This Hostie* is carryed about the streets in procession : and really it is very fine to see the solemnity.

But he went to another Prieſt, that lived in the Court, who gave him the pix with an hoſtie in it.

The confessor gave him an hostie,* with a piece of wood, that was, as he pretended, a true piece of the cross, and by these he was to be fortify himself, if any other apparition should come to him, since evil spirits would certainly be chained up by them.[…]The friar presented the hostie to them, which gave them such a check, that he was fully satisfied of the virtue of this preservative.

If the alarm goes off, the hostie stops and looks for the likely suspect or asks all the people in the nearest seats who has an electronic device and tells whoever it is to turn the device off. The hostie doesn't have to decide if some smartarse who wants to listen on a scanner is trying to convince her that it only an MP3 player or whether device A is OK and device B isn't OK. If her instruction is that the device is to be turned off, then it's turned off!

Emma, who is still 2.5 cm under the required hostie height and therefore may never realise her dream, said of her ordeal, ‘I was scared, but I did it for my career.’

2011, Les Hawkins, Great Australian Fly-Fishing Stories, Chapter 20, HarperCollins Publishers Australia, unnumbered page,
The cute hostie at the check-in for Kamchatka accepted a note the Russian Ambassador in Canberra had given me about excess luggage and gave me a smile rather than a bill.

Hostie

Meaning

Noun

Origin

Rhymes