ˈvakyəwəs adjective
Etymology: Latin vacuus
1. : emptied of or lacking content (as of air or gas)
vacuous spaces
2. : marked by or indicative of mental vacuity or lack of ideas or intelligence : lacking substance : thin in intellectual content : dull , stupid , inane
a vacuous mind
a vacuous expression
a vacuous play
3. : devoid of serious occupation : spent in inanities or frivolity : idle
4. : containing no element, point, or member : null — used of a class in mathematics or logic
Synonyms: see empty