noun Australian.

one of a horizontal set of fence rails that can be removed easily to leave a gateway.

Origin of slip-rail

First recorded in 1715–25 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for slip rail

slip rail


Australian and NZ a rail in a fence that can be slipped out of place to make an opening
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