On irc://irc.freenode.net/wiktionary and irc://irc.freenode.net/omegawiki you will typically find people who have an interest in Wiktionary and OmegaWiki. It is a great place to be not only for some good fun but also when you try to get to grips with difficult concepts like DefinedMeaning :)
If you have never used IRC before, you will need to download or install a client. .
If you do not want to install an IRC client you can also use this Web-based Client (works even behind a firewall). You only have to chose a nickname and connect to the channel #omegawiki.
If the above Web Client link is still broken, try this one or this one. Note, there is no entry in the pull-down list for #omegawiki. To join, select any channel on the list, and when your session opens, in the command bar at the bottom, type: /join #omegawiki.