gg5, prog, luminous

@@ -13,0 +14,2 @@
+<gloss>infeasible</gloss>
+<gloss>unreal</gloss>

https://context.reverso.net/translation/japanese-english/非現実的

https://eow.alc.co.jp/search?q=非現実的

Was specifically looking for a term for "impractical".  Wasn't sure about the entries here, and searched reverso and found this.

Reverso is roughly 50/50 unrealistic/impractical.  Since 現実的 is already "realistic, pragmatic", this would seems consistent. (not pragmatic = impractical)

alc has a laundry list of possibilities. Might be worth taking a glance, though the seem to have grabbed every conceivable synonym for this term.  But, "impractical" is on the list as:
impractical（計画・考え・目標などが）

"impractical goal" is exactly what I was looking for. Don't know if parentheticals are needed here or not , i.e.
impractical (e.g. plan, goal, etc.)

One of the glosses is "pie in the sky" :) That makes more sense for a E->J dictionary I think, but it does seem to back up the meaning I was going for.

@@ -12,0 +13 @@
+<gloss>impractical</gloss>