open-ended

English Thesaurus

1. allowing for future changes or revisions (adj.all)

similar	:	changeable, changeful,
definition	:	such that alteration is possible; having a marked tendency to change (adj.all)

2. allowing for a spontaneous response (adj.all)

similar	:	indeterminate, undetermined,
definition	:	not precisely determined or established; not fixed or known in advance (adj.all)

3. without fixed limits or restrictions (adj.all)

similar	:	unrestricted,
definition	:	not subject to or subjected to restriction (adj.all)