1. defensive military positions consisting of trenches, earthworks, or fortifications
Usage: military
2. the act or process of establishing something firmly or securely

Examples

• The soldiers built entrenchments along the ridge to protect against enemy fire.
• Ancient entrenchments can still be seen on the battlefield today.
• The general ordered deeper entrenchments before the expected attack.
• Archaeological evidence revealed extensive Roman entrenchments around the fort.
• The entrenchments of traditional values made social change difficult.
• Political entrenchments often prevent meaningful reform.
• The entrenchments of corruption within the system were hard to eliminate.