spec ‧ u ‧ la ‧ tive /ˈspekjələtɪv, ˈspekjʊlətɪv $ -leɪ-/ BrE AmE adjective
1 . based on guessing, not on information or facts
highly/purely/largely speculative
a purely speculative theory about life on other planets
2 . bought or done in the hope of making a profit later:
speculative investments
3 . if you give someone a speculative look, you look at them while trying to guess something about them
—speculatively adverb :
Delaney eyed her speculatively.