(grammar) The form of a verb used with the pronouns thou and you (singular), or their equivalents in other languages.

(grammar) The form of a verb used (in English and other languages) with singular nouns and with the pronouns he, she, it and one (or their equivalents in other languages).

Not accompanied by anything else; one in number. / Not divided in parts. / Designed for the use of only one. / Performed by one person, or one on each side.

(music) A 45 RPM vinyl record with one song on side A and one on side B. / (music) A popular song released and sold (on any format) nominally on its own though usually having at least one extra track.

To identify or select one member of a group from the others; generally used with out, either to single out or to single (something) out.

An artificial language based on a simplified version of Latin without inflections; also known as Interlingua

A person who sings, often professionally. / (square dance) dance figure with a fixed structure, sung by a caller, or a piece of music with that structure.

A person who, or device which, singes. / A machine for singeing cloth.

(trigonometry, signal processing) A periodically oscillating waveform as described by the sine function, possibly multiplied by some amplitude, shifted by some phase, and translated by an additive constant.

(transitive) To burn slightly. / (transitive) To remove the nap of (cloth), by passing it rapidly over a red-hot bar, or over a flame, preliminary to dyeing it.