ad idemadv.
/ˌad ˈɪdɛm/, U.S. /ˌæd ˈiˌdɛm/ Now chiefly Law.† 1. In reference to the matter in hand; with regard to the pertinent facts; to the point. Obsolete.
ΘΚΠ
the world > relative properties > relationship > in relation to [phrase] > in respect of or with regard to
in wise ofc1290
by (also for) reason ofa1350
as to (the) regard ofc1392
in regard of or toc1392
upon the side ofa1393
with regard toc1392
in respect of?a1425
in this (also that) behalf1458
upon the feat of1483
for (the) respect of1489
as pertains to1526
in order to1526
with respect1556
ad idem1574
on this behalf1581
in or with reference to1593
quoad hoc1601
in point of1605
with intuition to (of)1626
in the mention of1638
in terms of1704
how and about1753
as regards1797
as concerns1816
w.r.t.1956
1574 J. Whitgift Def. Aunswere to Admon. iii. vi. 187 Hitherto you haue proued nothing in question, neyther haue you reasoned ad idem.
1580 W. Fulke T. Stapleton & Martiall Confuted 196 Nay I slander him, for he reasoneth not ad idem.
1624 E. Forset Def. Right of Kings 13 This smooth mittigator will without winding away by circumlocutions..speake ad idem, plainely, and home to the purpose.
1718 T. Emlyn Dr. Bennet’s New Theory of Trinity Examined 47 They argue not ad idem, in the Deity, and in the Personality.
1796 Times 25 Nov. 3/2 They were ready to prove an alibi on the 25th: but that was not ad idem; it was nothing to the purpose.
1819 J. Wightwick Rep. Court of Exchequer 1810–11 382 The precedents that were produced, can be of no avail unless they are ad idem.
1864 Law Times Rep. 3 Sept. 5/1 How, if it had been pleaded, would it appear..to be ad idem?
2. In agreement; of the same mind. Cf. consensus ad idem at consensus n. Additions.
ΚΠ
1682 in T. B. Howell Compl. Coll. State Trials (1811) XI. 916 The witnesses are called, none of them are ad idem, and all of them most lame.
1722 R. Wodrow Hist. Sufferings Church of Scotl. II. vii. 320 None of the Witnesses, as far as I can see, are ad idem.
1821 Parl. Deb. 2nd Ser. 4 1498 Scarcely two members of which [government] were ad idem upon this point respecting the Catholics.
1868 M. Robertson Eng. Rep. Annotated I. 1071 It is not necessary that both parties should be ad idem with respect to the consequences of a breach.
1885 Law Times 30 May 80/2 The letters show that the parties were never ad idem.
1928 C. S. Lewis Let. 1 Apr. (1966) 126 The discussion ended..with the infuriating statement that we were not ad idem on the connotation of the word control.
1983 W. N. Rowe Clapp's Rock xiv. 212 I shall report to my clients that despite a rather feisty..conversation, all parties appear to be ad idem on this transaction.
2009 Times (Nexis) 9 July (Business section) 43 The two men were ad idem about oil.
This entry has been updated (OED Third Edition, December 2011; most recently modified version published online March 2022).
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adv.1574