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

petit \pet"it\ pe^t"y^; f. pet-e", a. f. see petty.
   small; little; insignificant; mean; -- same as petty.
   obs., except in legal language.
   1913 webster

         by what small, petit hints does the mind catch hold of
         and recover a vanishing notion.          --south.
   1913 webster

   petit constable, an inferior civil officer, subordinate to
      the high constable.

   petit jury, a jury of twelve men, impaneled to try causes
      at the bar of a court; -- so called in distinction from
      the grand jury.

   petit larceny, the stealing of goods of, or under, a
      certain specified small value; -- opposed to grand
      larceny. the distinction is abolished in england.

   petit ma^itre. f., lit., little master. a fop; a
      coxcomb; a ladies' man. --goldsmith.

   petit serjeanty eng. law, the tenure of lands of the
      crown, by the service of rendering annually some implement
      of war, as a bow, an arrow, a sword, a flag, etc.

   petit treason, formerly, in england, the crime of killing a
      person to whom the offender owed duty or subjection, as
      one's husband, master, mistress, etc. the crime is now not
      distinguished from murder.
      1913 webster
see also:
petty petit constable petit jury grand jury petit larceny grand larceny 
petit ma^itre petit serjeanty petit treason 

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

treason \trea"son\, n. oe. tresun, treisun, traisoun, of.
   tra"ison, f. trahison, l. traditio a giving up, a
   delivering up, fr. tradere to give up, betray. see traitor,
   and cf. tradition.
   1. the offense of attempting to overthrow the government of
      the state to which the offender owes allegiance, or of
      betraying the state into the hands of a foreign power;
      disloyalty; treachery.
      1913 webster

            the treason of the murthering in the bed. --chaucer.
      1913 webster

   note: in monarchies, the killing of the sovereign, or an
         attempt to take his life, is treason. in england, to
         imagine or compass the death of the king, or of the
         queen consort, or of the heir apparent to the crown, is
         high treason, as are many other offenses created by
         statute. in the united states, treason is confined to
         the actual levying of war against the united states, or
         to an adhering to their enemies, giving them aid and
         comfort.
         1913 webster

   2. loosely, the betrayal of any trust or confidence;
      treachery; perfidy.
      1913 webster

            if he be false, she shall his treason see.
                                                  --chaucer.
      1913 webster

   petit treason. see under petit.
      1913 webster
see also:
traitor tradition petit treason petit 

Petit >> P Words
Petit, definition of term: Petit
petit_pag1.html

Petit Mal >> P Words
Petit Mal, definition of term: Petit Mal
petit+mal_pag1.html

Petit Larceny >> P Words
Petit Larceny, definition of term: Petit Larceny
petit+larceny_pag1.html

Petit Four >> P Words
Petit Four, definition of term: Petit Four
petit+four_pag1.html

Petit Jury >> P Words
Petit Jury, definition of term: Petit Jury
petit+jury_pag1.html

High Treason >> H Words
High Treason, definition of term: High Treason
high+treason_pag1.html