Assistant

1. n. An attendant; one who is present.
2. a. Helping; lending aid or support; auxiliary.
3. a. Of the second grade in the staff of the army; as, an assistant surgeon.
4. n. One who, or that which, assists; a helper; an auxiliary; a means of help.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.