Definitions

1. noun

a person or thing that breaches something, especially a fortified place or a computer security system

“The breacher managed to crack the safe after several hours of trying.”

2. noun

a device or vehicle used to breach a fortified place or a barrier

“The military used a breacher to break through the enemy’s defenses.”

3. verb

to break through or into something, especially a fortified place or a computer security system

“The hacker tried to breach the company’s database but was caught.”