Solidly and thoroughly booked; fully scheduled with no free breaks or space; unavailable.

plural of sole right

(rare) The state or condition of being sold-out.

The part of the sun's 11-year cycle during which the number of sunspots and solar flares is at a minimum.

The part of the sun's 11-year cycle during which the number of sunspots and solar flares is at a maximum.

A chemical compound that is solid. / (grammar) A compound word with no spaces or hyphens in it, such as dishcloth, keyboard, or pancake.

plural of solid compound

plural of solitary wasp

Said before closing the bidding for a particular item in an auction, giving other bidders a final opportunity to bid for it.

A rechargeable battery that integrates a solar cell with battery power storage. / An assembly of solar cells, interconnected for higher voltage or current. (Analogy to cell and battery.)