greyoutgrayoutn.
/ˈɡreɪaʊt/, U.S. /ˈɡreɪˌaʊt/ Partial or incipient blackout (blackout n. 2) experienced by a person subjected to strong accelerative forces, esp. during flying; (more generally) momentary diminution of vision or consciousness, or partial loss of memory. Also: an instance of this. Cf. greying out n. 2, blackout n. 2, red-out n.
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the world > physical sensation > physical sensibility > physical insensibility > unconsciousness > [noun] > fainting or swooning
swimeOE
swowingc1000
swooningc1290
swoonc1330
soundingc1380
swelteringc1440
sweltingc1460
swalming1487
swounding1570
syncopization1598
fainting1601
lipothymy1603
defection1615
dereliction1647
swebbing1668
swound1880
greyout1942
the world > physical sensation > physical sensibility > physical insensibility > unconsciousness > [noun] > fainting or swooning > a faint or swoon
swimeOE
swooningc1290
swowa1325
swooningc1330
swoon1390
soundc1400
trancec1405
sweamc1415
swoundc1440
sweltingc1460
swarf1488
dwalm?a1513
sounding ecstasy?1565
sounding1580
pasme1591
death1596
lipothymy1603
deliquium1620
delique1645
fainting fit1714
drow1727
faint-fit1795
faint1808
blacking out1930
blackout1934
greyout1942
pass-out1946
1942 Richmond (Va.) Times-Dispatch 21 Dec. 13/1 The doctors learn airplane ambulance work... They learn about grayouts, blackouts and redouts.
1962 W. Schirra in J. Glenn et al. Into Orbit 46 When a man is pulling heavy Gs in the normal sitting position, the blood drains down from his head, and he can have a grey-out or a black-out.
1992 OnSat 16 Mar. 123/1 All pilots..learn how to cope with ‘grey out’—that state of mind marked by a gradual dimming of sight and alertness.
2003 E. J. Marshall et al. Treatm. Drinking Probl. vii. 102 ‘Fragmentary’ blackouts or ‘greyouts’ are patchy episodes of amnesia, with indistinct boundaries and islands of memory within these boundaries.
This entry has been updated (OED Third Edition, September 2013; most recently modified version published online March 2022).
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n.1942