Onto (someone or something)
To have discovered the truth about someone or something.My supervisor is onto the new saleswoman who is taking money from her sales register.
Only have eyes for (someone)
To like only one person, to be loyal to only one person.My sister only has eyes for her boyfriend.
One way or another
Somehow.One way or another I am going to attend the annual general meeting tomorrow.
One-upmanship
The ability to keep ahead of others, the ability to keep an advantage.The man's one-upmanship and his desire to be better than everyone else... Read more →
One up on (someone)
To have an advantage over someone, to be one step ahead of someone.The boy was one up on the other students because he studied very hard.
The one-two
Quick or decisive action that takes someone by surprise.The salesman gave the customer the one-two and the customer quickly agreed to buy the... Read more →
A one-track mind
Thinking about only one thing.The man has a one-track mind. All he thinks about is money.
One to a customer
Each person can have or receive only one of something.The cameras had a limit of one to a customer at the store.
One step ahead of (someone or something)
Better prepared or more successful than someone or something else, expecting and prepared for what will happen.The city was one step ahead of... Read more →
One of these days
Someday in the future.One of these days I am going to talk to my supervisor about moving to another department.