What is "turning engine"

Turning \Turn"ing\, n.

1. The act of one who, or that which, turns; also, a winding; a bending course; a fiexure; a meander.

   Through paths and turnings often trod by day.
   --Milton.

2. The place of a turn; an angle or corner, as of a road.

   It is preached at every turning.
   --Coleridge.

3. Deviation from the way or proper course.
   --Harmar.

4. Turnery, or the shaping of solid substances into various by means of a lathe and cutting tools.

5. pl. The pieces, or chips, detached in the process of turning from the material turned.

6. (Mil.) A maneuver by which an enemy or a position is turned.

   Turning and boring mill, a kind of lathe having a vertical spindle and horizontal face plate, for turning and boring large work.

   Turning bridge. See the Note under Drawbridge.

   Turning engine, an engine lathe.

   Turning lathe, a lathe used by turners to shape their work.

   Turning pair. See the Note under Pair, n.

   Turning point, the point upon which a question turns, and which decides a case.