Source : Webster's Revised Unabridged Dictionary (1913)

Indeterminate \In`de*ter"mi*nate\, a. [L. indeterminatus.]
   Not determinate; not certain or fixed; indefinite; not
   precise; as, an indeterminate number of years. --Paley.

   {Indeterminate analysis} (Math.), that branch of analysis
      which has for its object the solution of indeterminate
      problems.

   {Indeterminate coefficients} (Math.), coefficients
      arbitrarily assumed for convenience of calculation, or to
      facilitate some artifice of analysis. Their values are
      subsequently determined.

   {Indeterminate equation} (Math.), an equation in which the
      unknown quantities admit of an infinite number of values,
      or sets of values. A group of equations is indeterminate
      when it contains more unknown quantities than there are
      equations.

   {Indeterminate inflorescence} (Bot.), a mode of inflorescence
      in which the flowers all arise from axillary buds, the
      terminal bud going on to grow and sometimes continuing the
      stem indefinitely; -- called also {acropetal, botryose,
      centripetal, & indefinite inflorescence}. --Gray.

   {Indeterminate problem} (Math.), a problem which admits of an
      infinite number of solutions, or one in which there are
      fewer imposed conditions than there are unknown or
      required results.

   {Indeterminate quantity} (Math.), a quantity which has no
      fixed value, but which may be varied in accordance with
      any proposed condition.

   {Indeterminate series} (Math.), a series whose terms proceed
      by the powers of an indeterminate quantity, sometimes also
      with indeterminate exponents, or indeterminate
      coefficients. -- {In`de*ter"mi*nate*ly} adv. --
      {In`de*ter"mi*nate*ness}, n.

Source : WordNet®

indeterminate
     adj 1: not precisely determined or established; not fixed or known
            in advance; "of indeterminate age"; "a zillion is a
            large indeterminate number"; "an indeterminate point
            of law"; "the influence of environment is
            indeterminate"; "an indeterminate future" [syn: {undetermined}]
            [ant: {determinate}]
     2: having a capacity for continuing to grow at the apex; "an
        indeterminate stem" [ant: {determinate}]
     3: of uncertain or ambiguous nature; "the equivocal (or
        indeterminate) objects painted by surrealists"
     4: not capable of being determined; "the indeterminate number
        of plant species in the jungle"
     5: not leading to a definite ending or result; "an
        indeterminate campaign"