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OED:
gape, v. (geɪp)
Forms: 3–4 gapen, 5 gapyn, 6 Sc. gaip, 9 dial. ge(e)ap, 5– gape. Also 3 (once) pa. tense geapede.
[a. ON. gapa to open the mouth, gape, Sw. gapa, Da. gabe = MDu. and mod.Du. gapen, MLG. gapen, MHG. and G. gaffen to gape, stare. The word is not found in Gothic, and its further relations are uncertain; Skr. jabh-, Zend. jab- to yawn, gape, have been compared. ...]
1. intr. To open the mouth wide, esp. in order to bite or swallow anything. Said also of the mouth.
3.b. absol. To stare in wonder or admiration.
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gape, n. (geɪp)
Also 6 Sc. gaip, 8 gap(s). [f. gape v.]
1. The act of opening the mouth; a yawn.
2.a. An open-mouthed stare; a gaze of wonder or curiosity.
2.b. fig. A state of eagerness or wonder: also in phrase upon the gape. ? Obs.
agape, adv., prop. phr. (əˈgeɪp) [A prep. of state + gape.]
On the gape; with open mouth of expectation or wonder: hence fig. in an attitude or state of wondering expectation.
agape (ˈægəpiː) Pl. agapæ, -ai, rarely agapes. [Gr. ἀγάπη brotherly love.]
1. A ‘love-feast’ held by the early Christians in connexion with the Lord's Supper. Also in revived use, applied loosely to any Christian ritual meal. Also transf.
2. Now used commonly in its simpler N.T. sense of Christian love (of God or Christ or fellow Christians: see charity); freq. contrasted with Eros, earthly or sexual love.
ˈagapet Obs. [ad. Gr. ἀγαπητ-ός, loved.]
‘A lover of the fair sex; a man of pleasure,’ Ash.
1736 Bailey (Fol.) Agapet, a whoremaster; one that hunts after women. :inno: