ADJECTIVE (3)

1. characterized by lack of decision and firmness;
- Example: "an indecisive manager brought the enterprise to a standstill"

2. not definitely settling something;
- Example: "a long and indecisive war"

3. not clearly defined;
- Example: "indecisive boundaries running through mountains"

The Collaborative International Dictionary of English v.0.48:

Indecisive \In`de*ci"sive\, a. [Cf. F. ind['e]cisif.]
   [1913 Webster]
   1. Not decisive; not bringing to a final or ultimate issue;
      as, an indecisive battle, argument, answer.
      [1913 Webster]

            The campaign had everywhere been indecisive.
                                                  --Macaulay.
      [1913 Webster]

   2. Undetermined; prone to indecision; irresolute; unsettled;
      wavering; vacillating; hesitating; as, an indecisive state
      of mind; an indecisive character.
      [1913 Webster]

WordNet (r) 3.0 (2006):

indecisive
    adj 1: characterized by lack of decision and firmness; "an
           indecisive manager brought the enterprise to a
           standstill" [ant: decisive]
    2: not definitely settling something; "a long and indecisive
       war" [ant: decisive]
    3: not clearly defined; "indecisive boundaries running through
       mountains"