Ma'anar ƙamus na kalmar "gagaru" na iya bambanta dangane da mahallin, amma gaba ɗaya, yana nufin wani yanki na musamman na kwayoyin halitta mai takamaiman aiki ko manufa. Ga wasu ma’anoni daban-daban: Wani sashe na jikin dabba ko tsiro mai yin wani aiki na musamman, kamar zuciya, hanta, ko huhu a cikin dabba, ko tushen, kara, ko ganye a cikin shuka. wanda aka buga ta hanyar maɓalli ko wata hanyar sarrafawa. Bugawa ko na lokaci-lokaci, musamman wanda aka keɓe ga wani fanni ko sha'awa, kamar mujallar likita ko mujallar kasuwanci. Ƙungiya mai sarƙaƙƙiya ta zamantakewa, kamar gwamnati ko kamfani, mai sassa daban-daban ko raka'a tare da takamaiman ayyuka da ayyuka.