(UK, informal) A film assigned an age rating of 15, those under 15 not being permitted to view it. / (bibliography, informal) A book printed in the 15th century.

(transitive, obsolete in general sense) To cool down, make cool. / (transitive) Now specifically, to keep cool by containing within a refrigerator.

(medicine, obsolete) Having an excess of black bile. / Characterized by melancholy. / Ill-natured; malevolent; cantankerous.

plural of truck / The game of lawn billiards. / The wheel-set of railroad rolling stock.