/ ɑːˈkeɪɪk; NAmE ɑːrˈk-/ adjective
1.
old and no longer used :
'Thou art' is an archaic form of 'you are'.
2.
very old-fashioned
SYN outdated :
The system is archaic and unfair and needs changing.
3.
from a much earlier or ancient period of history :
archaic art
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WORD ORIGIN
mid 19th cent.: from French archaïque , from Greek arkhaikos , from arkhaios , from arkhē beginning.