(informal) to understand an idea or what somebody is saying It was a difficult concept to grasp, but I soon latched on. He latched on to the truth.
- 1to become attached to somebody/something antibodies that latch onto germs
- 2to join somebody and stay in their company, especially when they would prefer you not to be with them
- 3to develop a strong interest in something She always latches on to the latest craze.