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also smooth bore  (smo͞oth′bôr′)
Having no rifling within the barrel. Used of a firearm.
A firearm having no rifling.


1. (Firearms, Gunnery, Ordnance & Artillery) (modifier) (of a firearm) having an unrifled bore: a smoothbore musket.
2. (Firearms, Gunnery, Ordnance & Artillery) such a firearm
ˈsmoothˌbored adj


(ˈsmuðˌbɔr, -ˌboʊr)

1. (of a firearm) having a smooth bore; not rifled.
2. a smoothbore gun.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.smoothbore - a firearm that has no rifling
firearm, small-arm, piece - a portable gun; "he wore his firearm in a shoulder holster"
Adj.1.smoothbore - of a firearmsmoothbore - of a firearm; not having rifling or internal spiral grooves inside the barrel
References in periodicals archive ?
Today, the mechanics of why a spinning projectile flies straighter and longer than one fired from a smoothbore is well known, but such was not the case with our forebears.
The T-90 Tank offers the Syrian army several features their T-55 and T-72 models do not, including a 2A46M 125 smoothbore tank gun; a four-stroke V-12 piston engine; and most importantly, the Kontakt-5 ERA (explosive reactive armor).
Like the C96, the long barrel of the M712 produces ample accuracy for a smoothbore BB pistol.
However, for a given polymer, the higher the angle, the better the solids-conveying efficiency in smoothbore extruders.
Contract award: the purchase of special ammunition to smoothbore shotguns cal.
It was considered normal for a fine English-made airgun to come in a leather case with both a rifled barrel and a smoothbore barrel that could fire a load of shot.
62 mm remote-control machine gun and a 125 mm smoothbore cannon.
The "12-bore smoothbore slam firearm", consisting of two metal tubes and a makeshift handle, could be loaded with one cartridge.
It can be armed with a 120 mm or an 81 mm smoothbore mortar and is fitted with electric drives for automatic laying, state-of-the-art embedded fire control system, inertial navigation system and on-board ballistic computer which can be integrated in a battle management system which enables it to shoot a first round within 30 seconds of taking position.
When asked about use of firearms, the Minister said a Kyrgyz citizen brought a smoothbore gun, but shot himself in his leg as he did not know well how to use the gun.
Back here in Pike County, Illinois, in the good ol' days when the only gun you could use on whitetails was a smoothbore slug gun with rifle sights, we stand-sitters developed a system for figuring out what was happening with neighboring hunters on opening morning by listening to their shots.