Definition of "terr"

As he entered the trees, he called, "Terrs left about one minute ago – in a hurry. There is abandoned equipment – no time to collect – moving east on tracks."

2008, Alexandre Binda, The Saints: The Rhodesian Light Infantry, 30° South Publishers, page 92

If a terr's on the run or if he goes to ground, / It doesn't really matter 'cause they'll hunt him down. / And if that terr's the first that shoots, / He got no chance against the Black Boots.

c. 1970, John Edmond, Black Boots (song), in Troopiesongs (album)