A person who uses or is on a treadmill.

plural of treadmiller

A piece of indoor sporting equipment used to allow for the motions of running or walking while staying in one place.

(intransitive) To exercise on a treadmill. / To keep busy, for example with work or with other tasks, without being able to get ahead or make progress towards long-term goals.

plural of treadmill

Third-person singular simple present indicative form of treadmill

present participle of treadmill

(biology) The apparent locomotion of certain cellular filaments by adding protein subunits at one end, and removing them at the other.

simple past tense and past participle of treadmill

(lexicography) The process by which euphemisms fall into disuse and are replaced by new ones, as the old ones become socially unacceptable over time.