a daydream or fantasy; unrealistic imaginings or an impossible wishful thought

to daydream; to indulge in wishful thinking or have unrealistic fantasies about things that are impossible to achieve

in the middle of the day; specifically used to emphasize that something happened in plain sight

Something completely impossible or absurd; also describes something bizarre or strange happening that is impossible to believe.

In broad daylight; during the daytime (often used for emphasis when someone is doing something unexpected or improper during the day)

(dialect) a swindler, cheater, or trickster

(dialect) a petty thief or burglar who operates during the day

(colloquial) all day and all night; all the time without stopping