Final answer:
The word 'hegira' means a mass movement of people and is derived from the historical event known as the Hijra, where Muhammad and his followers migrated from Mecca to Medina. Option number 1 is correct.
Step-by-step explanation:
The term 'hegira' refers to a mass movement of people, which can be considered a form of migration. This word is rooted in the Islamic historical event known as the Hijra, which occurred in 622 CE when the Prophet Muhammad and his followers fled Mecca due to persecution and settled in Medina, an event that marks the beginning of the Islamic calendar.
In a more general sense, the word 'hegira' has come to mean any mass migration or journey, often connoting an exodus to escape adverse conditions. Therefore, the correct answer to the question about the meaning of 'hegira' is option 1, A mass movement of people.