2. Casual To believe in, Specially wholeheartedly or uncritically: couldn't buy into that brand of conservatism. With this definition, offered a natural amount n, the sentence "a set S has n aspects" can be formally described as "there exists a bijection from n to S. acquire - purchase by trade https://share.evernote.com/note/74e6f5bf-4e0f-8a5f-1a27-70e011ebb01c