[1] : The Collaborative International Dictionary of English v.0.48

forthright \forth"right`\ ? or ?, adv. forth, adv. + right,
   adv.
   straight forward; in a straight direction. archaic --sir p.
   sidney.
   1913 webster

[2] : The Collaborative International Dictionary of English v.0.48

forthright \forth"right`\, a.
   direct; straightforward; as, a forthright man. archaic
   --lowell.
   1913 webster

         they were night and day, and day and night,
         piligrims wight with steps forthright.   --emerson.
   1913 webster

[3] : The Collaborative International Dictionary of English v.0.48

forthright \forth"right`\, n.
   a straight path. archaic
   1913 webster

         here's a maze trod, indeed,
         through forthrights and meanders        --shak.
   1913 webster

[4] : WordNet (r) 2.0

forthright
     adj : characterized by directness in manner or speech; without
           subtlety or evasion; "blunt talking and straight
           shooting"; "a blunt new england farmer"; "i gave them
           my candid opinion"; "forthright criticism"; "a
           forthright approach to the problem"; "tell me what you
           think--and you may just as well be frank"; "it is
           possible to be outspoken without being rude";
           "plainspoken and to the point"; "a point-blank
           accusation" syn: blunt, candid, frank, free-spoken,
            outspoken, plainspoken, point-blank, straight-from-the-shoulder
     adv : directly and without evasion; not roundabout; "to face a
           problem squarely"; "the responsibility lies squarely
           with them"; "spoke forthright or forthrightly and to
           the point" syn: squarely, forthrightly
see also:
blunt candid frank free-spoken outspoken plainspoken 
point-blank straight-from-the-shoulder squarely forthrightly 

[5] : Moby Thesaurus II by Grady Ward, 1.0

57 moby thesaurus words for "forthright":
   aboveboard, artless, bluff, blunt, broad, brusque, candid, dead,
   dead ahead, direct, directly, downright, due, due north, explicit,
   frank, frankhearted, free, free-speaking, free-spoken,
   free-tongued, genuine, heart-to-heart, in a beeline, in line with,
   ingenuous, open, openhearted, outspoken, plain, plain dealing,
   plain-spoken, right, round, sincere, single, straight,
   straight across, straight ahead, straight-out, straightforward,
   straightforwards, straightly, transparent, unambiguous, unchecked,
   unconstrained, undeviatingly, undisguised, unequivocal, unguarded,
   uninhibited, unreserved, unrestrained, unswervingly, unvarnished,
   unveeringly

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Forthright, definition of term: Forthright
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