I think it's best to think of it as an entry-wide x-ref (a feature that will probably be added to JMdict: NG).
I've reindexed that sentence and chosen a new one for sense 1.

I don't think the antonym cross reference to sense 1 of 低い is right.
As I wrote last year in the entry for 低い:
  "Right now it seems we have
   低い[1] <-> 高い[2,3]
   低い[3] <-> 高い[1] (and possibly 低い[2])
   低い[4] <-> 高い[4,5]"

The current priority example sentence indexed to sense 01 of 高い seems like it should be sense 03 instead. It's definitely not high/tall.
  銀行はリスクの高い顧客へのローンには高い金利をつける。
  Banks charge higher interest on loans to risky customers.

Google N-gram Corpus Counts
╭─ーーー─┬────────────╮
│ 高い　 │ 62,758,210 │
│ 高価い │      4,201 │ - [iK] to [sK]
│ たかい │    711,529 │
╰─ーーー─┴────────────╯

@@ -12 +12 @@
-<ke_inf>&iK;</ke_inf>
+<ke_inf>&sK;</ke_inf>
@@ -21 +20,0 @@
-<stagk>高い</stagk>

gg5 daijs
conflated "high (number)" (e.g. high blood levels) with 
"high (quality)" though both gg5 and daijs keep them apart
split "loud" and "high-pitched" though both gg5 and daijs 
keep them together

@@ -29,0 +30,15 @@
+<gloss>high-priced</gloss>
+</sense>
+<sense>
+<pos>&adj-i;</pos>
+<gloss>high (level)</gloss>
+<gloss>above average (in degree, quality, etc.)</gloss>
+</sense>
+<sense>
+<pos>&adj-i;</pos>
+<gloss>loud</gloss>
+</sense>
+<sense>
+<pos>&adj-i;</pos>
+<gloss>high-pitched</gloss>
+<gloss>shrill</gloss>