Lexical reality is measured against ordinary linguistic assignment; religious reality against an established religious convention; and customary reality against common or specialized usage. Figurative expressions can be classified along the same axes, because every nonliteral use is judged against a baseline.
Examples:
“Asad” for the animal — lexical literal use.
“Asad” for a brave person with a suitable context — lexical figure.
“Ṣalāh” for ritual worship — religious literal use.
“Ṣalāh” for supplication within the contrasting religious convention — religious-relative figure.
Always ask which established convention supplies the baseline.