1. Fortified projections on the wall of a fortress, typically polygonal and angular in shape
The castle's bastions provided excellent defensive positions.
Os bastiões do castelo forneciam excelentes posições defensivas.
2. A person, place, or institution strongly defending or upholding a particular principle or practice
Universities are bastions of free speech and intellectual inquiry.
As universidades são bastiões da liberdade de expressão e da investigação intelectual.
3. A stronghold or center of resistance
The city remained a bastion of resistance against the invasion.
A cidade permanecia um baluarte de resistência contra a invasão.