frank in WordNet English dictionary

1. 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"
   blunt  candid  forthright  frank  free-spoken  outspoken  plainspoken  point-blank  straight-from-the-shoulder 
   
2. clearly manifest; evident
   "frank enjoyment"
   frank 
   

1. a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
   frank  frankfurter  hotdog  hot dog  dog  wiener  wienerwurst  weenie 
   

1. exempt by means of an official pass or letter, as from customs or other checks
   frank 
   
2. stamp with a postmark to indicate date and time of mailing
   postmark  frank