vanguard
🇺🇸
/ˈvænɡɑːrd/
🇬🇧
/ˈvænɡɑːd/
the leading group or person in a particular field or movement
The company is proud to be in the vanguard of scientific progress, always at the forefront of new discoveries.
the leading troops in an advancing army
The army was advancing steadily, with the vanguard already at the border, ready to engage the enemy.