(æd)  [ad. L. add-re; f. ad to + dre to give, put.] 

    1. a. To join or unite (a thing to another) so as to increase the number, quantity, or importance. spec. in Horse-racing (cf. ADDED ppl. a. c).
 
  c1374 CHAUCER Boeth. III. ix. (1868) 83 Lat vs quod she an adden reuerence to suffisaunce and to power..Certis, quod I, lat vs adden it. 1388 WYCLIF Hosea xiii. 2 Thei addiden to do synne, and maden to hem a otun ymage [1382 Puttiden to. Vulg. Addiderunt ad peccandum]. 1570 BILLINGSLEY Euclid I. ii. 7 If ye adde equall thinges to equall thinges: the whole shalbe equall. 1593 SHAKES. 3 Hen. VI, V. iv. 70 I need not adde more fuell to your fire. 1611 BIBLE Matt. vi. 27 Which of you by taking thought, can adde one cubite vnto his stature? 1756 BURKE Nat. Soc. Wks. I. 29 Add to the account those skirmishes which happen in all wars. 1816 Racing Cal. 1815 XLIII. 15 The Old Stakes of 10 gs. each, with 20 gs. added. 1827 HUTTON Mathem. I. 8, 5 + 3 denotes that 3 is to be added to 5. 1848 Sporting Life 5 Aug. 277/1 By subscriptions of 20 sovs. each..with 100 added from the racing fund. 1859 TENNYSON Guinevere 203 Yet this grief Is added to the griefs the great must bear. 1934 Times 18 Oct. 5/4 The Cesarewitch Stakes, a handicap, of 25 sovs. each, with 1,000 sovs. added.
 

    b. To give by way of increased possession or share (to a person). Obs.
 
  1534 TINDALE Rev. xxii. 18 God shall adde vnto him the plages that are wrytten in this boke. 1611 BIBLE Matt. vi. 33 All these things shalbe added vnto you. [Wycl. cast, Tind., Cranm., Genev. ministred, Rheims given you besides.] 1640 FULLER Abel Rediv. (1867) I. 18 Posterity may know who added the part of helpful Onesiphorus to this Paul in bonds. 1709 STRYPE Ann. Ref. liii. 532 Who seemed by the special will of God to be added to the Queen in those most difficult times.
 

    c. to add faith to: to give credence to, to believe. Cf. L. addere fidem, Fr. ajouter foi. Obs.
 
  1483 CAXTON Cato fiiijb, Thow oughtest not euer byleue that that men sayen and reporten to the, ne to adde feythe to hit.
 

    2. (With object unexpressed) To make an addition to; to increase, augment, enlarge.
 
  1591 SHAKES. 1 Hen. VI, I. i. 103 My gracious Lords, to adde to your laments..I must informe you of a dismall fight. 1697 DRYDEN Virgil, Georgic I. 420 When Autumn weighs The Year, and adds to Nights, and shortens Days. Mod. It adds greatly to our labour, but also to our pleasure.
 

    3. To say or write further or in addition; to go on to say or speak.
 
  1382 WYCLIF Gen. xv. 3 And Abram addide, To me forsothe thow hast not ouun seed. 1388 Luke xix. 11 He addide, and seide a parable [Another MS. He addide to. 1382 He puttinge to, seide a parable]. 1611 SHAKES. Cymb. V. v. 19 Further to boast, were neyther true, nor modest, Vnlesse I adde, we are honest. 1671 MILTON P.R. I. 497 He added not; and Satan bowing low His gray dissimulation, disappeared. 1735 POPE Epil. Sat. ii. 133 But let me add, Sir Robert's mighty dull. 1879 S. C. BARTLETT Egypt to Palest. x. 224 It may be added, in this connection, that the iron..occurs elsewhere in the Peninsula.
 

    4. To unite (two or more things or numbers) into one sum; often with together. absol. To perform the arithmetical process of addition. To add up, to find the sum of a column or series of numbers, to ‘cast’; also absol.; to add in, to include in a sum.
 
  1509 HAWES Past. of Pl. XV. v, Who knewe arsmetryke in every degre..Bothe to detraye and to devyde and adde. 1579 DIGGES Stratioticos 2 To adde is to gather and knit in one many numbers or unites. a1704 LOCKE (J.) As easily as he can add together the ideas of two days, or two years. 1754 D. FENNING Brit. Youth's Instructor (ed. 2) 12 When you have two or three rows of figures..add up the first row, [etc.]. Ibid. 25 To add up well..is a great Step towards Multiplication. 1796 HUTTON Math. Dict. 29/2 Add each column separately, and carry the overplus as before, from one column to another. 1872 HAMB. SMITH Algebra 2 When several numbers are added together, it is indifferent in what order the numbers are taken. 1879 COLENSO Arithm. 2 We then add these figures thus, 5 and 7 are 12.
 

    5. intr. in phr. to add up:    a. To make the desired, expected, or correct total.
 
  1850 DICKENS Dav. Copp. xli, The figures made her cry. They wouldn't add up, she said. 1864 Good Words 316/2 On one occasion, it struck me that a series of figures just given by the traffic-manager of a railway company, would not add up. 1885 Sat. Rev. 21 Feb. 243 Of the sixteen articles of diet enumerated, the percentages of five only will ‘add up’. 1893 Chambers's Jrnl. 26 Aug. 532/1 Account books that would not add up right.
 

    b. to add up to, to amount to, to signify, to come to mean. Also absol., to add up, to make sense, to be significant or consistent.
 
  1933 S. HOWARD Alien Corn I. 35 What is it that adds up to? A trio! 1936 Time 10 Feb. 23/1 The ship, plus the service, plus the passenger list, plus the Caribbeanit all adds up to the best vacation I ever had. 1938 E. S. GARDNER Case Shoplifter's Shoe (1939) ix. 158 All right..I wasn't home last night. So what does that add up to? 1942 Daily Progress (Charlottesville, Va.) 27 Apr. 8/4 How does it [sc. the evidence] all add up? 1945 M. ALLINGHAM Coroner's Pidgin xi. 88 I've tried to make it mean something else, but it doesn't add up any other way. 1945 A. J. P. TAYLOR Course German Hist. 8 There were and, I dare say, are many millions of well-meaning kindly Germans, but what have they added up to? 1958 Oxf. Mag. 6 Mar. 342/1 As a contribution to the philosophy of religion, this volume of essays does not add up to much.