Two heads are better than one means that when two people work together they are more likely to solve a problem than one person doing it alone.
I can help you to have this presentation ready tomorrow morning. Let's work together. Two heads are better than one.
My sister and I discussed lots of ideas to make mum's party a success. Two heads are better than one.
When you say two people or two teams are head-to-head, you mean that they are competing against each other.
Student rowers in the north-east of England are preparing to go head-to-head in the annual university boat race on the river Tyne.
Turtles range right across the world's oceans, making them difficult animals to survey, but researchers say their numbers are falling fast. All seven species of sea turtle are now listed as either endangered or critically endangered.