bramble

Short definition from Wiktionary

Noun

1. 1
   Any of many closely related thorny plants in the genus Rubus including the blackberry and likely not including the raspberry proper.
2. 2
   Any thorny shrub.
3. 3
   A cocktail of gin, lemon juice, and blackberry liqueur.
4. 4
   The soft fruit borne by the species Rubus fruticosus formed of a black (when ripe) cluster of drupelets.
5. 5
   A collection of mutually touching connected subgraphs, where two subgraphs touch if they share a vertex or each includes one endpoint of an edge.

Verb

1. 1
   To pick or collect blackberries from brambles.

Proper noun

1. 1
   A surname.