[range.elements.iterator] Avoid "defining" typedef-names

Use "determine"/"declare" instead.

Author: frederick-vs-ja

source/ranges.tex

@@ -10099,7 +10099,7 @@
 
 \pnum
 The member \grammarterm{typedef-name} \tcode{iterator_concept}
-is defined as follows:
+is determined as follows:
 \begin{itemize}
 \item
 If \exposid{Base} models \libconcept{random_access_range},
@@ -10115,9 +10115,9 @@
 \end{itemize}
 
 \pnum
-The member \grammarterm{typedef-name} \tcode{iterator_category} is defined
+The member \grammarterm{typedef-name} \tcode{iterator_category} is declared
 if and only if \exposid{Base} models \libconcept{forward_range}.
-In that case, \tcode{iterator_category} is defined as follows:
+In that case, \tcode{iterator_category} is determined as follows:
 Let \tcode{C} denote the type
 \tcode{iterator_traits<iterator_t<\exposid{Base}>>::iterator_category}.
 \begin{itemize}