The process whose specific outcome is the progression of lymph nodes over time, from their formation to the mature structure. A lymph node is a round, oval, or bean shaped structure localized in clusters along the lymphatic vessels, with a distinct internal structure including specialized vasculature and B- and T-zones for the activation of lymphocytes. [ GOC:add https://www.worldcat.org/search?q=bn%3A068340007X https://www.worldcat.org/search?q=bn%3A0781735149 ]