Word Study
clueless
WORDNET DICTIONARY
Adjective clueless has 1 sense
CIDE DICTIONARY
clueless, adj.
- not providing any clue. [PJC]
- completely uninformed or unaware; hopelessly ignorant; utterly bewildered. [PJC]
OXFORD DICTIONARY
clueless, adj. colloq. ignorant, stupid.
Derivative
cluelessly adv. cluelessness n.
For further exploring for "clueless" in Webster Dictionary Online