1. (n.) A carpenter's tool for boring holes larger than those bored by a gimlet. It has a handle placed crosswise by which it is turned with both hands. A pod auger is one with a straight channel or groove, like the half of a bean pod. A screw auger has a twisted blade, by the spiral groove of which the chips are discharge.

2. (n.) An instrument for boring or perforating soils or rocks, for determining the quality of soils, or the nature of the rocks or strata upon which they lie, and for obtaining water.

aculeus acumination bit bore bore bit borer brace and bit breast auger breast drill broach burr chamfer bit corkscrew cross bit cusp diamond drill drill drill press gimlet hand drill keyway drill mucro neb needle nib point portable drill posthole auger power drill prick prickle pump drill ratchet drill reamer rotary drill star drill sting strap drill tap tip trepan trephine twist bit twist drill wimble