Look at this sentence:
Avoid making obscure references unless you’re sure that your audience will recognise the source.
Select the definition of obscure that the sentence uses.
obscure \uhb-skyoor\ adjective obscurer, obscurest 1. not well known: An obscure local band was the opening act of the concert. 2. not clearly seen: Those distant stars are quite obscure without a telescope. 3. not easily understood: Few students were able to follow the professor’s obscure logic. — from Latin (obscurus)


