'Spile hole' definitions:

Definition of 'Spile hole'

From: GCIDE

Spile \Spile\ (sp[imac]l), n. [Cf. LG. spile, dial. G. speil, speiler, D. spijl. [root]170.]
1. A small plug or wooden pin, used to stop a vent, as in a cask. [1913 Webster]
2. A small tube or spout inserted in a tree for conducting sap, as from a sugar maple. [1913 Webster]
3. A large stake driven into the ground as a support for some superstructure; a pile. [1913 Webster]
4. (Mining) One of the thick laths or poles driven horizontally ahead on top of a set of the main timbering in advancing a level in loose ground.
Syn: forepole; spill[2d]. [RDH]
Spile hole, a small air hole in a cask; a vent. [1913 Webster]