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• Sustantivo que designa a una persona autorizada para actuar en nombre de otra, o un símbolo en una expresión lógica o matemática que puede ser sustituido por cualquier elemento de un conjunto dado.

A noun referring to a person authorized to act on behalf of another, or a symbol in a logical or mathematical expression that can be replaced by any member of a specified set.

1. Person acting on behalf of anotherB2formal

   An individual who is authorized to act or make decisions for someone else, often in a temporary capacity.

   Persona que actúa en nombre de otro

   • The CEO appointed a placeholder to attend the conference in her absence.
   • During the trial, a placeholder was used to represent the absent witness.
   • He served as a placeholder for the manager until a permanent replacement was found.

   Sinónimosagentalternatedeputylocum tenensproxyrepresentativestand-insubstitutesurrogateunderstudy

2. Symbol in logic or mathematicsC1formalscientific

   A symbol, such as a variable, used in a logical or mathematical expression that can be replaced by any element from a specified set.

   Símbolo en lógica o matemáticas

   • In algebra, 'x' is often used as a placeholder for an unknown number.
   • The logical expression uses a placeholder to represent any possible value.
   • Mathematicians use placeholders to simplify complex equations.

   Sinónimosvariable