In this part—
"offer" means an offer to settle made under this part.
"offer to settle" ...
"proceeding" means a proceeding—
(a) started by claim; or
(b) in which the court has made an order under rule 14 ordering the proceeding to continue as if started by claim; or
(c) started by originating application if an order or direction has been made for pleadings, or other documents defining the issues, to be filed and served.