1. Full of spines; thorny; as, a spiny tree.
2. Like a spine in shape; slender. Spiny grasshoppers sit chirping.
3. Abounding with difficulties or annoyances. The spiny deserts of scholastic philosophy. (bp. Warburton) Spiny lobster.
(Science: zoology) same as rock lobster, under Rock. See also Lobster.
Origin: From Spine.