Pronunciation: [mˈə͡ʊst fˈɜːst bˈɔːn] (IPA) 
The spelling of the phrase "most first born" can be broken down phonetically as /moʊst fɜrst bɔrn/. The word "most" is pronounced with a long "o" sound and a soft "t" at the end. "First" is pronounced with a diphthong (two vowel sounds blended together) and a soft "t" at the end. "Born" is pronounced with a soft "r" at the end. This phrase refers to the majority of people who are the oldest child in their family.
The term "most first born" refers to a categorization or classification denoting the individuals or entities that hold a position of being the majority or largest in number among all the firstborn people, animals, or objects within a defined group or context. It pertains specifically to the firstborn members or items that are predominant or constituent in terms of quantity or frequency.
In the case of individuals, "most first born" refers to the individuals who are born first among all siblings within a family. These individuals enjoy the distinction of being the eldest among their siblings. For instance, if a family has three children, the oldest child would be considered the "most first born" out of the three. In this context, "most first born" implies that there is a higher number of firstborn children compared to the count of other siblings.
Within a broader context, "most first born" can also refer to an observation or statistical fact regarding the general population or a specific group. In this sense, it signifies that firstborn children are the most common type of birth order among all individuals. For instance, if a study reveals that in a certain community, the majority of households have firstborn children, it can be stated that "most first born" individuals are prevailing in that population.
In essence, the term "most first born" encompasses the notion of being the primary or primary constituent among firstborn individuals in terms of numbers, frequency, or statistical representation.
