Cite this: eDIL s.v. gibis or

n (applied to something hollow ) :

(a) a gullet, a jaw : co ngibsib (ginsib v.l.) gol nginach | tucsat a rith robalc | in chonart `baying with jaws agape,' Metr. Dinds. iii 408.6 . cuanart M. ... rosmudaig mucc Mod dia gibis ic Loch Con, SG ii 468.7 = LL 167a41 .

(b) a gorge, a glen, a valley : gibhis .i. gleann, O'Cl. gibhis glaine .i. gleann glan, O'Cl. geibhis .i. gleann, O'Cl. gibis glaine `the bright neck of land,' Metr. Dinds. iv 104.38 . g s. Callraighe ngibhsi, ZCP x 339 § 10.

(c) a cleft, cavity or socket : tucad coss chraind dó : rachuir a glún na gibis (v.l. gebis) he put his knee into the socket, RC xiii 80.17 .

(d) Transf., of a fight : sunn tucad an debaid donn ... roba ger grinn gibhis gann the fight was keen, intense, close-serried (?), Celt. Rev. iv 214.21 .