to meet by chance, run into

contingent, casual, accidental, incidental

by chance, incidentally

chance, contingency

park

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

a forest-park, arboretum

national park