Constthe page lists the name as an \alias{}
the name is a page's \name{}
a replacement function documented next to its reader, or the other way round (dim<- on dim)
an S3 method with no page of its own, answered by the page of its generic (print.foo by print)
an S4 method documented under its generic,signature-method alias, or the generic answering for it
How a name was matched to its manual page, see RdIndex.topicOf.