vac·u·ous (v
k
y
-
s)
adj.
1. Devoid of matter; empty.
2.
a. Lacking intelligence; stupid.
b. Devoid of substance or meaning; inane: a vacuous comment.
c. Devoid of expression; vacant: “The narrow, swinelike eyes were open, no more vacuous in death than they had been in life” Nicholas Proffitt.
3. Lacking serious purpose or occupation; idle. See Synonyms at empty.