rain or shine
Regardless of the circumstances; (more literally) regardless of the state of the weather.
The game will be held on Saturday rain or shine.
verb
To emit or reflect light so as to glow.
The water shone pacifically; the sky, without a speck, was a benign immensity of unstained light; the very mist on the Essex marshes was like a gauzy and radiant fabric, hung from the wooded rises inland, and draping the low shores in diaphanous folds.
‘No. I only opened the door a foot and put my head in. The street lamps shine into that room. I could see him. He was all right. Sleeping like a great grampus. Poor, poor chap.’
To reflect light.
To distinguish oneself; to excel.
My nephew tried other sports before deciding on football, which he shone at right away, quickly becoming the star of his school team.
“[…] I was grateful to you for giving him a year’s schooling—where he shined at it—and for putting him as a clerk in your counting-house, where he shined still more.”
To be effulgent in splendour or beauty.
So proud she shyned in her Princely state.
Once brightest shined this child of heat and air.
To be eminent, conspicuous, or distinguished; to exhibit brilliant intellectual powers.
Few are qualified to shine in company; but it in most men's power to be agreeable.
noun
Brightness from a source of light.
the distant shine of the celestial city
Brightness from reflected light.
Excellence in quality or appearance; splendour.
Shoeshine.
Take a shine. You need it.
Sunshine (typically in contrast with rain).
be fair or foul, or rain or shine
verb
To cause (something) to be smooth and shiny by rubbing; put a shine on (something); polish (something).
He shined my shoes until they were polished smooth and gleaming.
To polish a cricket ball using saliva and one’s clothing.