Origin: Latin suffix -al
Identical has 7 different meanings across 1 category:
Something which has exactly the same properties as something else.
"The two snowflakes were identical, sharing every single crystal structure and size."
In plain English: An identical is not actually used as a noun, so it has no meaning on its own; you only use the word to describe two things that are exactly the same.
"Please note that identical is an adjective and does not have a standard usage as a noun in English, so no such example sentence can be provided. However, if you meant to use it as an adjective (its most common form), here is a natural example: The twin brothers wore identical suits to the wedding."
exactly alike; incapable of being perceived as different
"rows of identical houses"
"cars identical except for their license plates"
"they wore indistinguishable hats"
having properties with uniform values along all axes
"The two crystal specimens were identical, displaying perfectly symmetrical atomic structures extending uniformly in every direction."
Bearing full likeness by having precisely the same set of characteristics; indistinguishable.
"The twins wore identical outfits, making them completely indistinguishable from one another."
In plain English: Identical means two things are exactly the same and cannot be told apart.
"The twins looked identical in their matching outfits."
Usage: Use identical to describe two or more things that are completely indistinguishable from one another in every detail, such as twins with matching fingerprints. This word is stronger than synonyms like similar because it implies no differences exist whatsoever between the subjects being compared.
The word identical comes from combining Latin identic with the suffix -al. It entered English to mean exactly what it does today: being of the same kind or nature.