1. droops, hangs down, or sinks from weight or pressure
Usage: third person singular present
2. weakens or declines in strength, spirit, or value
Usage: third person singular present

1. instances of drooping or sinking downward
Usage: plural

Examples

• The old roof sags under the weight of snow.
• Her energy always sags in the afternoon.
• The rope sags between the two posts.
• The economy sags during difficult times.
• The mattress sags in the middle where he sleeps.
• There are several sags in the fence line.
• The bridge shows dangerous sags in its structure.