add-onn.adj.
/ˈadɒn/, U.S. /ˈædˌɔn/, /ˈædˌɑn/ Originally U.S.
A. n.
Something added to an existing object or quantity; an additional component or sum; an accessory device, esp. one designed to increase capability.
ΘΚΠ
the world > relative properties > wholeness > completeness > [noun] > by supplying what is wanting > one who or that which supplies what is wanted
supplier1574
supplementer1644
suppletory1647
supplementor1697
makeweight1750
adjunctive1755
expletivea1878
add-on1930
the world > relative properties > wholeness > incompleteness > part of whole > [noun] > a separate part > a piece or bit > added to or subtracted from a surface or figure
quirk1679
add-on1963
society > computing and information technology > [noun] > system additions
add-on1987
add-in1988
1930 U.S. Patent 1,772,514 3 The jaws are opened sufficiently to permit easy entry of..four blocks..the blocks being in the nature of ‘add-ons’ or ‘build-ups’.
1941 Sun (Baltimore) 27 Oct. 11 Business installment loans..are exempted from the limitations. In the case of so-called ‘add-ons’..either the additional credit may be treated separately, or the combined credit may be paid in fifteen months.
1963 A. J. Hall Student's Handbk. Textile Sci. v. 259 Quite a large amount of the solid ingredients of the flameproofing emulsion must be deposited in the fabric to give complete protection against fire..but it is claimed that this add-on usefully increases the strength..of the fabric.
1970 Sat. Rev. (U.S.) 27 June 56/1 Their new Quadraphonic Processor is an add-on bringing true (and quite well simulated) quad sound to two-channel systems.
1987 T. Forester High-tech Society (1989) iv. 86 People on the ‘net’ often share expensive add-ons such as storage disks and high-speed printers.
2005 New Scientist 13 Aug. 45/2 Many FM stations broadcast a signal called radio digital system (RDS), a digital add-on to the analogue signal that contains limited amounts of information.
B. adj. (attributive).
That is an add-on; supplementary.
ΘΚΠ
the world > relative properties > wholeness > completeness > [adjective] > making complete > by supplying what is wanting
supplemental1605
supplianta1616
suppletorya1631
suppletive1633
expletive1652
eking1653
supplementary1667
makeweight1701
suppl.1800
supplementing1851
make-up1885
add-on1955
society > computing and information technology > [adjective] > added to system
add-on1979
add-in1984
1955 N.Y. Times 13 Feb. viii. 7/1 Combination and add-on units now available for warm air, steam and hot-water heating are..more efficient than ever before.
1965 Wireless World Aug. 389/1 These can be satisfied by an add-on flywheel unit.
1978 Detroit Free Press 16 Apr. f11/2 (advt.) Mobile home with expanded liv rm, add-on sunroom.
1979 Personal Computer World Nov. 56/1 They will also be demonstrating colour add-on boards for this machine.
1989 Which? Sept. 444/2 Some satellite transmissions are (or will be) scrambled or encoded; to watch them, you'll need to get an add-on decoder box.
2007 Observer 4 Nov. (Mag.) 8/2 Enemybook is an add-on application allowing Facebook users to ‘manage enemies’.
This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021).
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n.adj.1930