The alternateness of occupied and vacant seats in the auditorium helped maintain social distancing.

In phonology, an alternant is a surface variant of a morpheme conditioned by its phonetic environment.

The chemist compared several alternants of the compound to determine which had the best stability.

The alternant pattern in the matrix ensured that entries alternated in sign when moving from one row to the next.

The lights alternated between red and green every few seconds.

The committee noted several alternations in the schedule that required immediate adjustment.

The novel's structure relies on the alternance of past and present timelines to build suspense.

Her altern duties meant she and her colleague performed the watch in shifts.

The mechanics replaced the alternators in several old trucks to solve the charging problems.

The lights were alternating between red and green, briefly confusing the drivers.