1. [n]  a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
2. [n]  a member of the ancient Germanic peoples who spread from the Rhine into the Roman Empire in the 4th century
3. [adj]  characterized by disconcerting 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"
4. [adj]  clearly manifest; evident; "frank enjoyment"
5. [v]  exempt by means of an official pass or letter, as from customs or other checks
6. [v]  stamp with a postmark to indicate date and time of mailing

1. \Frank\, n. [OF. franc.]
   A pigsty. [Obs.]
   
   

2. \Frank\, v. t.
   To shut up in a frank or sty; to pen up; hence, to cram; to
   fatten. [Obs.] --Shak.
   
   

3. \Frank\, n. (Zo["o]l.)
   The common heron; -- so called from its note. [Prov. Eng.]
   
   
   
   

4. \Frank\, a. [Compar {Franker}; superl. {Frankest}.] [F.
   franc free, frank, L. Francus a Frank, fr. OHG. Franko the
   name of a Germanic people on the Rhine, who afterward founded
   the French monarchy; cf. AS. franca javelin, Icel. frakka.
   Cf. {Franc}, {French}, a., {Franchise}, n.]
   1. Unbounded by restrictions, limitations, etc.; free. [R.]
      ``It is of frank gift.'' --Spenser.
   
   2. Free in uttering one's real sentiments; not reserved;
      using no disguise; candid; ingenuous; as, a frank nature,
      conversation, manner, etc.
   
   3. Liberal; generous; profuse. [Obs.]
   
            Frank of civilities that cost them nothing.
                                                  --L'Estrange.
   
   4. Unrestrained; loose; licentious; -- used in a bad sense.
      --Spenser.
   
   Syn: Ingenuous; candid; artless; plain; open; unreserved;
        undisguised; sincere. See {Candid}, {Ingenuous}.
   
   

5. \Frank\, v. t. [imp. & p. p. {Franked}; p. pr. & vb. n.
   {Franking}.]
   1. To send by public conveyance free of expense. --Dickens.
   
   2. To extempt from charge for postage, as a letter, package,
      or packet, etc.
   
   

6. \Frank\, n. [See {Frank}, a.]
   The privilege of sending letters or other mail matter, free
   of postage, or without charge; also, the sign, mark, or
   signature denoting that a letter or other mail matter is to
   free of postage.
   
   
   
      I have said so much, that, if I had not a frank, I must
      burn my letter and begin again.             --Cowper.
   
   

7. \Frank\, n. [Cf. F. franc. See {Frank}, a.]
   1. (Ethnol.) A member of one of the German tribes that in the
      fifth century overran and conquered Gaul, and established
      the kingdom of France.
   
   2. A native or inhabitant of Western Europe; a European; -- a
      term used in the Levant.
   
   3. A French coin. See {Franc}.
   
   

["Using BINS for Interprocess Communication", P.C.J. Graham, SIGPLAN Notices 20(2):32-41 (Feb 1985)].