Conlang Dictionary

artlang1
A language constructed for the beauty or fun of doing so. [From art(istic) + lang(uage)]
artlang2
(See conlang) [From art(ificial) + lang(uage)]
auxlang
A language constructed to replace or complement natlangs to facilitate cross-linguistic communication. [From aux(iliary) + lang(uagae]
conlang
  1. n. A constructed language
  2. v. To construct a language
[From con(structed) + lang(uage)]
engelang /endZlæŋ/
A conlang that is designed to certain criteria, such that it is objectively testable whether the criteria are met or not. This is different from claiming that the criteria themselves are 'objective'. For example, the Lojban/Loglan roots are designed to be maximally recognisable to the speakers of the (numerically) largest languages in the world in proportion to the number of speakers. It is not a matter of taste whether this criterion is met; it is something that can be tested. (by John Cowan) [From eng(ineered) + lang(uage)]
etabnannery /ra:mnænəɹi/
The state of appearing entirely unpredictable, but, upon closer analysis, failing at even being that. [From Etá̄bnann(i), a conlang by Tristan McLeay, which was supposed to have an unpredictable orthography, but ended up just having a confusing one. Damn people trying to make patterns everywhere. At least it's a bugger to typeset!... errm... back to the derivation + -ery]
maggelity /mə"gɛ:lIti/
  1. The state of being entirely unpredictable.
  2. The state of being regularly unpredictable, such as to horribly confuse anyone unfamiliar with the language, lulling them into a full sense of security before pointing out, cartoon-character-style, that the ground no longer exists where they're standing. (Tristan McLeay and H. S. Teoh)
[From Maggel, a conlang by Christophe Grandsire which has a rarely predictable orthography]
Maggel's Paradox
Your radical ideas have already occurred to others. (Muke Tever)

Unattributed definitions are by Tristan McLeay and are free to be used without restriction. Other definitions are from whoever is attributed in the parethesis after the definition. The words themselves are free to be used by whoever wants to in whatever way they want, much like 'the' or 'green' are.