Empty; unfilled; void; vacant.
- Devoid of matter; empty.
- Lacking intelligence; stupid.
- Devoid of substance or meaning; inane: a vacuous comment.
- Devoid of expression; vacant: "The narrow, swinelike eyes were open, no more vacuous in death than they had been in life” ( Nicholas Proffitt).
- Lacking serious purpose or occupation; idle. See Synonyms at empty.