- tidal bore, eagre [UK, dialect], aegir [non-standard], eager [UK, dialect] Diameter of a tube or gun barrel - gauge, caliber [US], calibre [Brit, Cdn] a hole or passage made by a drill; usually made for exploratory purposes - bore-hole, drill hole. Verb: bear (bore,borne, also born) behr. Have as a feature; convey "bear a resemblance"; "bear ...