OPEN UP

v. 1. To show for the first time; make clear; reveal. The story of Helen Keller's life opened up a whole new world to Mary. Einstein's theories opened up a whole new area for study. 2. To make available; present an opportunity; offer. The building of the railroad opened up new lands to the pioneers. John opened up a whole new section of the Scrabble board. 3. informal To go faster. When they got out on the highway John opened up and drove at 65 miles per hour. 4. informal To begin to shoot. When they got close to the enemy lines, they opened up with all they had. 5. informal To begin to talk frankly. After John learned to trust Mr. Jones, he opened up and told him how he felt. 6. To spread out. After a while the road opened up and they traveled more quickly. 7. To become available. When she got her college diploma, many new jobs opened up.