Definitions:

1. encounter by chance verb
   • I stumbled across a longlost cousin last night in a restaurant
2. miss a step and fall or nearly fall verb
   • I stumbled over the tree root.
3. walk unsteadily verb
   • The drunk person stumbled about.

Synonyms:

• bumble
• coggle
• dodder
• falter
• hit
• lurch
• paddle
• slip up
• stagger
• toddle
• totter
• trip
• trip up
• waddle

NearBy Words:

• stumblebum
• stumbler