Definition of reinstate for English Language Learners : to put (someone) back in a job or position that had been taken away : to begin using or dealing with (a law, policy, system, etc.) again
Detailed Synonyms for period of time in English. period of time: period of time [the ~] noun. the period of time the term; the period of time; the period; the space of time; the time; the space term [the ~] noun.
Science and mathematics. Unit of time. Period (physics), the duration of time of one cycle in a repeating event. Orbital period, the time needed for one object to complete an orbit around another. Period (periodic table), a horizontal row of the periodic table.