Adjective circular has 3 senses
  1. round, circular - having a circular shape
  2. annular, annulate, annulated, circinate, circular, ringed, ring-shaped, doughnut-shaped - shaped like a ring
    Antonyms: angular, angulate (indirect, via rounded)
  3. circular, rotary - marked by or moving in a circle
    Antonyms: noncyclic, noncyclical (indirect, via cyclic)
,Noun circular has 1 sense
  1. circular, handbill, bill, broadside, broadsheet, flier, flyer, throwaway - an advertisement (usually printed on a page or in a leaflet) intended for wide distribution; "he mailed the circular to all subscribers"
    --1 is a kind of ad, advertisement, advertizement, advertising, advertizing, advert
    --1 has particulars: stuffer
    Derived forms: verb circulate3, verb circularize1, verb circularize3, verb circularise1, verb circularise2, verb circularise3