roller-coaster
adjective
roll·er-coast·er
| \ ˈrō-lər-ˌkō-stər
, ˈrō-lə-ˌkō-\
, ˈrō-lə-ˌkō-\
Definition of roller-coaster
(Entry 1 of 2)
: marked by numerous ups and downs
an entertainer's roller-coaster career
roller coaster
noun
roll·er coast·er
| \ ˈrō-lər-ˌkō-stər
, ˈrō-lē-ˌkō-\
, ˈrō-lē-ˌkō-\
Definition of roller coaster (Entry 2 of 2)
1
: an elevated railway (as in an amusement park) constructed with sharp curves and steep inclines on which cars roll
2
: something resembling a roller coaster
especially
: behavior, events, or experiences characterized by sudden and extreme changes
an emotional roller coaster