noun, used as a suffix
stopping at; limited to; no further than
Noun suffix attached to a place, time, or quantity to indicate that something stops there or is confined to that limit. Often used in phrases like 駅止まり (stopping at the station) or 一日止まり (lasting only one day).
See also: 止まり (とまり)
このバスは駅止まりです。
This bus stops at the station (and goes no further).
彼の成功は一発屋止まりだった。
His success was limited to being a one-hit wonder.
The reading とまり is the standard noun form meaning 'stop' or 'end', while どまり is the suffix form attached to other words.
Derived from the verb 止まる (とまる, 'to stop') with rendaku voicing, used as a suffix.