فهو الكلمة المستعملة
It is the word as actually used.
Single-word majāz concentrates on the lexical occurrence, not on an entire sentence. “Single” refers to the location of the figurative transfer; it does not simply mean a text containing only one word.
When “lion” denotes a brave person, the interpretive shift concerns that word. A multiword expression whose complete communicative meaning is transferred to another purpose belongs to a different kind of analysis.