1. [adjective] Characterized by speculation; based on guessing, unfounded opinions, or extrapolation.
2. [adjective] Pursued as a gamble, with possible large profits or losses; risky.
3. [adjective] Pertaining to financial speculation; Involving or resulting from high-risk investments or trade.
4. [adjective] 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'.
5. [adjective] Not based on fact or investigation; 'a notional figure of cost helps in determining production costs'; 'speculative knowledge'.
6. [adjective] Showing curiosity; 'if someone saw a man climbing a light post they might get inquisitive'; 'raised a speculative eyebrow'.
