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Identical or equal in nature, form, or quantity
They wore the same outfit to the party.
Their clothing was identical.
The twins have the same birthday.
They share the same birth date.
Often used with 'the' to refer to a specific identical thing.
The same (as) - used to indicate similarity or equality
She has the same problem as her brother.
Her problem is identical to her brother's.
The weather today is the same as yesterday.
The weather conditions are identical.
Often used with 'as' to compare two things.
Use 'the same as' to compare two things that are identical.
'Same' is more common in everyday speech, while 'identical' is more precise and formal.
From Middle English 'same', from Old English 'sāme', from Proto-Germanic 'samaz' (same), from Proto-Indo-European 'sémos' (same).
Can be used as a pronoun ('I want the same') or adjective ('same color'). Often used with 'as' to compare things.