Rigid/ˈrɪdʒɪd/ Definition 1 of 3Pro Tip 1/2Physical Flexibility Describes the lack of physical flexibility in objects, emphasizing their toughness or durability. The rigid steel frame supports the heavy machinery. Pro Tip 2/2Resistance to Force Highlights how something can withstand force without bending, emphasizing its strength. He held onto the rigid branch to pull himself up.