I have configured Solr so that the terms I'm searching are highlighted, but if those terms are far between them, I will only see the first one in the highlighting snippet.
What I want is to have something similar to Google's: separating snippets with an "ellipse" (...) so I can see the multiple terms in their context at once.
Is it possible?
You're looking for the hl.snippets parameter. It defaults to 1, and determines how many (maximum) snippets each highlighted field returns in each document.
See http://wiki.apache.org/solr/HighlightingParameters#hl.snippets