eggshell /ˈɛɡʃɛl/adjective 3noun 2forms 3 adjective3 •Of a pale yellowish-whitish colour, like that of the eggshell.The ceiling panels are in off-white eggshell semi-matt finish. — 1959 •Very matt, having a low reflexivity, like an eggshell.This clear varnish is available in gloss, matt and eggshell finishes. •Exhibiting the thinness, translucency or near-transparency, and fragility of an eggshell. noun2 •The shell around an egg.Like Egge-shels mou'd upon their Surges, crack'd / As easily ’gainst our Rockes. — 1611 •A pale off-white colour, like that of the eggshell of many chickens. formseggshells · more eggshell · most eggshell