After the festival, the troupe surprised everyone by staging several experimental one-acters that explored memory and loss.

I was not one bit surprised.

Her constant one-upsmanship at staff meetings created a tense atmosphere.

The older pamphlet repeatedly uses the spelling one's self to mean the reflexive pronoun.

The one legged stool wobbled whenever someone sat on it.

Although the style guide prefers 'twenty-one', the old ledger consistently records the age as twenty one.

Landing the contract gave our team a one-up over the competition.

By arriving early to the meeting, he gained a one up over his rivals.

She constantly tries to one-up her friends with bigger accomplishments.

The team launched an all-as-one response to the crisis, coordinating efforts across departments.