1. To a high degree or extent; favourably or with much respect
   "extremely interesting"
   - highly, majorly 
2. To an extreme degree
   "extremely cold"; "extremely unpleasant"
   - exceedingly, super, passing

See also: extreme

• clear-cut
• clear-eyed
• clear-headedness
• clear-sighted
• clear-thinking
• clearance
• clearance sale
• clearcole
• clearcutness
• cleared
• clearheaded
• clearing
• clearing bank
• clearing house
• clearly
• clearness
• clearstory
• clearway
• clearweed
• cleat
• cleats
• cleavable
• cleavage
• cleavage cavity
• cleave