of bear-to perforate or penetrate, as a solid body, by turning an auger, gimlet, drill, or other instrument; to make a round hole in or through; to pierce; as, to bore a plank.-to form or enlarge by means of a boring instrument or apparatus; as, to bore a steam cylinder or a gun barrel; to bore a hole.-to make (a passage) by laborious effort, as in boring; as, to bore one's way through a crowd; to force a narrow and difficult passage through.-to weary by tedious iteration or by dullness; to tire; to trouble; to vex; to annoy; to pester.-to befool; to trick.-to make a hole or perforation with, or as with, a boring instrument; to cut a circular hole by the rotary motion of a tool; as, to bore for water or oil (i. e., to sink a well by boring for water or oil); to bore with a gimlet; to bore into a tree (as insects).-to be pierced or penetrated by an instrument that cuts as it turns; as, this timber does not bore well, or is hard to bore.-to push forward in a certain direction with laborious effort.-to shoot out the nose or toss it in the air; -- said of a horse.-a hole made by boring; a perforation.-the internal cylindrical cavity of a gun, cannon, pistol, or other firearm, or of a pipe or tube.-the size of a hole; the interior diameter of a tube or gun barrel; the caliber.-a tool for making a hole by boring, as an auger.-caliber; importance.-a person or thing that wearies by prolixity or dullness; a tiresome person or affair; any person or thing which causes ennui.-a tidal flood which regularly or occasionally rushes into certain rivers of peculiar configuration or location, in one or more waves which present a very abrupt front of considerable height, dangerous to shipping, as at the mouth of the amazon, in south america, the hoogly and indus, in india, and the tsien-tang, in china.-less properly, a very high and rapid tidal flow, when not so abrupt, such as occurs at the bay of fundy and in the british channel.-imp. of 1st & 2d bear.