A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ?

o
verb0 The 'out' directional command. Repeated use of o from most sensible rooms will lead to the ford where Valley connects to Simon's rooms, although from MUD1 rooms you'll stick at NRBL if you're carrying anything.
object
1. noun Something in the game which exists therein as a physical entity. Even seemingly amorphous things like smells and (in MUD1) views of places can be objects. Items in the vocabulary refer to objects, and commands manipulate objects, but neither are themselves objects.
2. noun Something at the bottom of the CLASS hierarchy. "If you K DWARF you'll attack all the ones present because DWARF is a class. You want D17 - that's an object". See class (1).
3. noun Something which is not a mobile or a player or a room or (sometimes) a container. This MUD1 usage carried over into other MUAs, including MUD2. "The apple can't move on its own, it's just an object".
4. verb0 What wizzes do if they disagree with something about to be imposed by arch-wizzes or by a majority of active wizzes. In the UK, always ineffective; in the USA, always effective.
5. noun In grammatical terms, the 'direct object' of a sentence. In MUAs, the basic form of a sentence is <verb> <noun> <preposition> <noun>, and therefore the first <noun> is the object. The second <noun> is the instrument. See command (2).
off
verb1 To kill a persona (or sometimes a mobile) dead dead. "The vampire offed my necro last night".
output
1. noun What your FE displays on your screen. This normally doesn't mean characters (2) echoed back from your input, except when this echoing fails. line-noise usually manifests itself in output as gibberishly random characters splurged together. See input (1).
2. verb1 To cause output (1) to appear. "Then the FE outputs a blank line". See input (2).