This is the 3101st most frequent Catalan word.
or
Gold.
In this sentence, "or" is used as a noun referring to the precious metal gold.
La medalla està feta d'or.
The medal is made of gold.
Here, "or" is used metaphorically to describe the exceptional quality of the singer's voice, indicating its richness or value.
La veu d'or del cantant va impressionar a tothom.
The singer's golden voice impressed everyone.
In this case, "or" is employed figuratively to signify that the plan is exceptionally effective, akin to the value of gold.