1. ((informal) stupid, slow witted or dull) stupid
   - blockheaded, boneheaded, duncical, duncish, fatheaded, loggerheaded, thick, thickheaded, thick-skulled, birdbrained, thick-witted

See also: stupid

• double-dip
• double-dyed
• double-edged
• double-entry bookkeeping
• double-faced
• double-geared
• double-glaze
• double-humped
• double-hung window
• double-jointed
• double-magnum
• double-park
• double-prop
• double-propeller plane
• double-quick
• double-reed instrument
• double-space
• double-spaced
• double-spacing
• double-team
• double-tongued
• double-u
• doubled
• doubleheader
• doubler