In a single or unaccompanied manner; without a companion. / Individually; particularly; severally. / Without partners, companions, or associates; single-handed. / Honestly; sincerely; simply.

A material formed from by the growth of a crystal nucleus without secondary nucleation or impingement on other crystals; a regular three-dimensional structure extends throughout the material

Without help from others; unassisted. / Using only one hand. / Designed for only one hand.

In a single-handed manner.

simple past tense and past participle of single-hand

To type (or format) text without leaving a blank line between each line of text. / To type (or format) text with only one space between consecutive sentences.

(mathematics) Any function in which each point in the domain maps to just one point in the range

(transitive) To select one from a group and treat differently.

A nuclear family with only one parent.

A person, often one of a group, who sings carols, especially at Christmas.