undesirable āļāļ·āļāļāļ°āđāļĢ undesirable āļāļ·āļāļāļ°āđāļĢ Not likely to please; objectionable: undesirable intrusions. Not wanted: undesirable aliens. A person regarded as undesirable: "men tentatively regarded as scoundrelsâor at least as undesirablesâ ( New York).