> as lemmas
postnoon
postnoon n. and adj.
Brit. 
/(ˌ)pəʊs(t)ˈnuːn/
, /(ˌ)pəʊs(t)ˈnuːn/U.S. /ˌpoʊs(t)ˈnun/
rare (a) n. afternoon; (b) adj. occurring or undertaken after midday./ˌpoʊs(t)ˈnun/ΘΚΠ
the world > time > day and night > day or daytime > afternoon > [noun]
evenOE
overnoonOE
midovernoona1325
afternoonc1330
mid-afternoona1400
undern1470
after-dinner1576
postmeridian1583
evening1587
post meridiem1647
none1656
noon1667
postnoon1686
aft1772
p.m.1776
after1906
pip emma1912
arvo1933
pee em1933
afty1966
1686 J. Goad Astro-meteorologica i. xv. 96 At other hours of the Ante-Noon, and Post-Noon more especially.
1968 Times 6 Nov. 3/2 A genuine statistical bias towards either prenoon or postnoon sightings would be important evidence for calculating the orbits of meteorites.
2000 Pittsburgh (Pa.) Post-Gazette (Nexis) 23 June a18 Mr. Baker's vision sounds like a call for prenoon or postnoon lunch hours.
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as lemmas