plural of only

A person who has no siblings. / A person raised as the sole child in a household.

plural of only child

recently; just now / barely; by only a small margin

(rail transport) Describing a railway line that is used only by freight trains

(computing) Unalterable, capable of being read but not written.

A form of sex education that advocates only abstinence as a means to avoid pregnancy and sexually transmitted diseases.

(computing) Capable of being written but not read.

Written on an invitation to request that the invited person reply only if they will not attend.

Used other than figuratively or idiomatically: see only, daughter. / The sole female among siblings.