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from Wiktionary, Creative Commons Attribution/Share-Alike License.

• preposition Against; next to; near; towards; as far as.
• preposition Capable of.
• preposition Ready for.
• preposition Willing to participate in.
• preposition As much as; no more than.
• preposition For the option or decision of.
• preposition Doing; involved in (with implications of mischief).
• preposition Incumbent upon; the obligation of; the duty of.
• preposition mathematics Considering all members of an equivalence class the same.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective busy or occupied with
• adjective having the requisite qualities for