Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun blue_sky

1 sense of blue sky

Sense 1
blue sky, blue, blue air, wild blue yonder -- (the sky as viewed during daylight; "he shot an arrow into the blue")
       => sky -- (the atmosphere and outer space as viewed from the earth)

Antonyms of adj blue_sky

1 sense of blue-sky

Sense 1
blue-sky -- (without immediate commercial value; "the company cannot afford to do blue-sky research")

INDIRECT (VIA noncommercial) -> commercial -- (connected with or engaged in or sponsored by or used in commerce or commercial enterprises; "commercial trucker"; "commercial TV"; "commercial diamonds")

Similarity of adj blue_sky

1 sense of blue-sky

Sense 1
blue-sky -- (without immediate commercial value; "the company cannot afford to do blue-sky research")
       => noncommercial (vs. commercial) -- (not connected with or engaged in commercial enterprises)