adoptable noun 3adjective 2forms 3 noun3 •A person or animal that is eligible to be adopted. •A character of which one can claim ownership, designed by an artist. •(Internet) A unique creature for a user to adopt. adjective2 •Able to be adopted.Only after reaching three weeks of age are the infants considered adoptable. •Desirable to adopt.Personability and youthful vigor make this puppy highly adoptable. formsadoptables · more adoptable · most adoptable