What does "in aid of" mean?

for the sake of, for (usually placed at the end of a question when quizzing a person about why they have done something)

In aid of

Common synonyms include: allocates water for industry, for, in favor of, on account of, provision of services, water for life.

prep, slang

prep, slang ·Uncommon ·College level

Preposition

1
for the sake of, for (usually placed at the end of a question when quizzing a person about why they have done something) UK, informal
"- What's that coaster in aid of? - This table gets stained by cups very easily."

"- What's that coaster in aid of? - This table gets stained by cups very easily."