- a metal spiked gate erected behind a terrace of houses to deter burglars
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for alley gate
Yes, I see where the lane turns; I see very well in the dark—never fear—only do not delay—I am so glad you locked the alley-gate.
"I suppose burglars are abroad on nights like this," and he quietly relocked the alley-gate.