Meaning of speculative

(adj) not financially safe or secure; "a bad investment"; "high risk investments"; "anything that promises to pay too much can't help being risky"; "speculative business enterprises"

not based on fact or investigation; "a notional figure of cost helps in determining production costs"; "speculative knowledge"

showing curiosity; "if someone saw a man climbing a light post they might get inquisitive"; "raised a speculative eyebrow"