word, adj. — Green’s Dictionary of Slang

word adj.

[phr. the last word in…, ult. Fr. le dernier cri]

(US campus) fashionable; a term of general approval.

1988		Eble Campus Sl. Mar. 11: word – expression of agreement.
2002		(con. 1980s) i80s.com 🌐 word adj. Very cool or wicked. ‘That movie was word!’.