placeholder
🇺🇸
/ˈpleɪshəʊldər/
🇬🇧
/ˈpleɪshəʊldə(r)/
A temporary stand-in for something that is missing or to be added later.
The teacher asked students to use the word 'cat' as a placeholder for the animal they wanted to describe.
A word or phrase in a sentence that is necessary for grammatical structure but does not carry meaning.
In the sentence 'It is raining,' 'it' is a placeholder with no specific meaning.