Noah Webster's New International Dictionary of the English Language

1. (a.) Not divided; not separated or disunited; unbroken; whole; continuous; as, plains undivided by rivers or mountains.

2. (a.) Not set off, as a share in a firm; not made actually separate by division; as, a partner, owning one half in a firm, is said to own an undivided half so long as the business continues and his share is not set off to him.

3. (a.) Not directed or given to more than one object; as, undivided attention or affection.

4. (a.) Not lobed, cleft, or branched; entire.