Henry George Liddell, Robert Scott, A Greek-English Lexicon

A.according as, just as, IG12.90.43, 116.27, Men.Mon.551, PCair.Zen.188.8 (iii B.C.), Plb.3.107.10, LXXGe.7.9, etc.; ὁ κ. παρατεταγμένος σφυγμός the (so to speak) 'regular' pulse (a military metaphor), Archig. ap. Gal.8.626.

II. also καθάπερ , Ion. κατάπερ , Philol.14, Democr.164, Hdt.1.182, al., Ar.Eq.8, Ec. 61, IG12.39.42, al., D.37.16, etc.: freq. in legal instruments, “ἡ πρᾶξις ἔστω κ. ἐκ δίκης” PEleph.1.12 (iv B.C.), etc.: with a part., like ὡς, ἅτε, D.C.37.54 (nisi leg. καίπερ):—strengthd., καθάπερ εἰ (Ion. κατάπερ εἰ, Hdt.1.170), like as if, exactly as, Pl.Phlb.22e, 59e, al.; καθάπερ ἄν (for ἐάν) D.23.41; καθάπερ “ἂν εἰ” Pl.Lg.684c, Arist.Ph.240b10, Plb. 3.32.2, etc.:—μάχαιραν κ. like a knife, Porph.Chr.31. Cf. καθό, καθώς.