An all‐inclusive review is proposed on the adsorption‐absorption phenomena concerning both equilibrium and growth of crystals. The logical path starts with the relations between the adsorption and growth of pure crystals, continues with the change of the crystal shape due to the surface adsorption of foreign substances (without absorption in the crystal bulk) and terminates with the absorption and crystal growth. Historical aspects are widely illustrated along with the fascinating alternation of observations, experimental efforts and theoretical knowledge.