3. a. The process of printing. Now rare.

1509 HAWES Past. Pleas. XLV. (Percy Soc.) 220 Go, little boke! I praye God the save From misse metryng by wrong impression. 1577-87 HARRISON England I. x. in Holinshed 44 At such time as I first attempted to commit this booke to the impression. 1602 T. FITZHERBERT Apol. Pref. 1b, This Apology being written..and made ready for the seemed stay the impression of it, vntil [etc.]. a1794 GIBBON Mem. Misc. Wks. 1814 I. 260 The impression of the fourth volume had consumed three months. 1837-9 HALLAM Hist. Lit. I. I. iii. §73. 193 The number of scholars was still not sufficient to repay the expenses of impression.

b. The result of printing; a print taken from type or from an engraving or the like; a printed copy.

1559 Primer in Priv. Prayers (1851) 114 Neither to sel nor bye of any other impressions than suche as shal be Printed by the sayde Richard. 1589 NASHE Ded. Greene's Menaphon (Arb.) 10 Euerie priuate Scholler..beganne to vaunt their smattering of Latine, in English Impressions. 1613 PURCHAS Pilgrimage (1614) 438 They print..the letters not being therein set backeward, that in the impression they may appeare forward. 1698 FRYER Acc. E. India & P. 20 Bundles of Characters tied together to Ape Printing. What they make their Impression on, I cannot inform you. 1821 CRAIG Lect. Drawing vii. 381 He rubs the plate over with printing ink, as if an impression were about to be taken. 1832 BABBAGE Econ. Manuf. xi. (ed. 3) 72 Coloured impressions of leaves upon paper may be made by a kind of surface printing. 1869 MRS. HEATON A. Dürer II. iii. (1881) 215 Very early impressions of Dürer's engravings are seldom now to be met with.

6. The effect produced by external force or influence on the senses or mind. a. An effect produced on the senses; a sensation, or sense-perception, in its purely receptive aspect.

1632 J. HAYWARD tr. Biondi's Eromena 107 The more inclined to receive the impression of the one [black] than of the other [white]. 1651 HOBBES Leviath. II. xxvii. 156 The impressions our Senses had formerly received. 1736 BUTLER Anal. I. v. Wks. 1874 I. 89 Passive impressions grow weaker by being repeated upon us. 1807 T. THOMSON Chem. (ed. 3) II. 202 It has sourish taste at first, then makes a bitterish cooling impression, and at last leaves an agreeable sweetness. 1855 BAIN Senses & Int. I. ii. §22 (1864) 62 An impression of sound, a musical note, for example, is carried to the brain. 1875 JOWETT Plato (ed. 2) IV. 278 It is hard to say how much our impressions of hearing may be affected by those of sight.

. . . .
c. In the philosophy of Hume (see quots.).

1739 HUME Hum. Nat. I. i. Wks. 1874 I. 311 Those perceptions, which enter with most force and violence, we may name impressions. 1742 Ess. Hum. Und., Orig. Ideas (1817) II. 16 By the term impression, I mean all our more lively perceptions, when we hear, or see, or feel, or love, or hate, or desire, or will... Impressions are distinguished from ideas, which are the less lively perceptions, of which we are conscious, when we reflect on any of those sensations or movements above mentioned.