To inseminate a woman or female animal means to put a male's sperm into her in order to make her pregnant. The gadget is used to artificially inseminate cows. + insemination in·semi·na·tion The sperm sample is checked under the microscope before insemination is carried out. see also artificial insemination. to put sperm into a woman or female animal in order to make her have a baby artificial insemination (past participle of inseminare, from semen; SEMEN)