one-man band noun

1. A musician who carries and plays many instruments simultaneously
2. (also one-man show) an organization, activity, etc, run very much by one person who refuses the help of others (figurative)

one-man show noun

1. A show performed by one person
2. A one-man band (figurative) or the person running it

one-naˈtion adjective

(of a country) socially integrated

one-nightˈer or one-night stand noun

1. A performance or performances, or anything similar, given on one single evening in one place by one or more people who then travel on to another place
2. A sexual relationship lasting only one night (informal)

oneˈ-offˈ adjective and noun

(something) made, intended, done, etc for one occasion only

oneˈ-oneˈ adjective

One-to-one

one-on-oneˈ same as one-to-one below.

one-parent family noun

A family in which, due to death, divorce, etc, the children are looked after by only one parent

oneˈ-piece adjective

Made in one piece

noun

A garment, esp a swimsuit, made in one piece

oneˈ-shot adjective

1. (intended to be) done, used, etc on only one occasion or for one particular purpose or project
2. One-off
3. Not part of a serial

noun

A thing that happens on one occasion only

one-sidˈed adjective

1. Limited to one side
2. Partial
3. Biased
4. (of a competition, etc) with one person or side having a great advantage over the other
5. Developed on one side only
6. Turned to one side

one-sidˈedly adverb

one-sidˈedness noun

oneˈ-step noun

1. A dance of US origin danced to quick march time
2. A piece of music for this dance

intransitive verb

To dance a one-step

oneˈ-stop adjective

(of a store, etc) providing a variety of goods or services all at one source

oneˈ-time adjective

Former, past

oneˈ-to-oneˈ adjective

1. Corresponding each one uniquely to one other
2. With one person meeting, opposing, playing, etc one other

oneˈ-track adjective

1. Incapable of dealing with more than one idea or activity at a time
2. Obsessed with one idea to the exclusion of others

one-trick pony see under pony

one-twoˈ noun (informal)

1. A blow with one fist followed by a blow with the other (boxing, etc; also figurative)
2. A movement in which a player passes the ball to another player, then runs forward to receive it again (football)

one-upˈmanship noun

(title of humorous book by Stephen Potter, 1952) the art of being one up, ie scoring or maintaining an advantage over someone

oneˈ-way adjective

1. Proceeding, or permitting travel, or set apart for traffic, in one direction only
2. Not requiring reciprocal action, etc
3. Not reciprocated

one-way glass or one-way mirror noun

A sheet of glass which can be looked through from one side but which appears from the other side to be a mirror

one-worldˈer noun

Someone who subscribes to one-worldism

one-worldˈism noun

A belief in the government of the world as a whole rather than as separate states and nations

all one

1. Just the same
2. Not important

a (or the) one (informal)

A person special or remarkable in some way

a one for (informal)

An enthusiast for

at one

1. Of one mind
2. Reconciled (with with)

be made one (archaic)

To get married

be one up on

To score an advantage over (another)

for one

As at least one, albeit possibly the only one, as in I for one disagree

for one thing

As one reason for objection, there being potentially more

in one or all in one

1. Combined
2. As one unit, object, etc

just one of those things

An unfortunate happening that must be accepted

one and all

Everyone without exception

one another see another

one by one

Singly in order

one or two

A few