From BiblePortal Wikipedia

Wilson's Dictionary of Bible Types [1]

 Genesis 37:9 (a) The eleven stars represent the eleven brothers of Joseph who were to bow down to him as they afterward did. (See  Genesis 42:6;  Genesis 43:26;  Genesis 43:28;  Genesis 44:14;  Genesis 50:18).

 2 Kings 23:36 (c) The eleven years represent the number six which is the number of man's sufficiency joined with the number five, the number of human weakness. He had the ability to reign but did not have the heart to walk with God.

 Matthew 28:16 (c) The number eleven reminds us that these men had sufficient instruction from Christ, sufficient inspiration from the Holy Spirit, and sufficient knowledge of God, yet they failed in so many respects. There should have been twelve patriarchs all working together but one was missing for many years. There should have been twelve disciples working together, but one proved to be a traitor. The number eleven reminds us of the failure even of that which is planned and ordained of God while it is in human hands.

Webster's Dictionary [2]

(1): ( n.) A symbol representing eleven units, as 11 or xi.

(2): ( a.) Ten and one added; as, eleven men.

(3): ( n.) The sum of ten and one; eleven units or objects.

(4): ( n.) The eleven men selected to play on one side in a match, as the representatives of a club or a locality; as, the all-England eleven.

King James Dictionary [3]

Elev'En, a. elev'n. Ten and one added as eleven men.