HyperDic

English > 1 sense of the word addlehead:
NOUNperson addlehead, addle-head, loon, birdbraina person with confused ideas
English > addlehead: 1 sense > noun 1, person
MeaningA person with confused ideas; incapable of serious thought.
Synonymsaddle-head, loon, birdbrain
Broadermisfitsomeone unable to adapt to their circumstances