Taimakekeniya kalma ce ta addini tare da abun ciki na ɗabi'a wanda a zahiri yana nufin haɗin kai, taimako da shiga (daidai da kalmar "haɗin kai" a cikin Ingilishi), duk da haka, ana amfani da shi azaman kalmar kimiyya a yawancin ilimomi kamar ilmin sanin halitta, ilimin zamantakewa, ilimin halin ɗan adam, ilimin halin dan Adam, tattalin arziki da ci gaba.
Gabaɗaya, an yi amfani da haɗin gwiwa a cikin ra'ayoyi da yawa, mafi mahimmanci daga cikinsu sune misalai masu zuwa:
1. Haɗin kai da ƙoƙarin haɗin gwiwa don biyan buƙatu ɗaya.
2. Taimakon kai da rashin jiran taimako daga wasu.
3. Taimakawa (taimakawa juna) da kuma la'akarin nasarar mutum ya dogara da nasarar wasu.
4. Aikin da ke faruwa a cikin kamfanin haɗin gwiwa.
5. Taimakawa wasu ko "wasu taimako". A kan wannan ma’anar “haɗin kai”, taimakon wasu ba tare da tsammanin taimako ko tunanin fa’idar da za ta samu ta taimakonsu ba shi ne cikakken taimakon juna, sadaukarwa da “sadaukarwa”. A rayuwa ta zahiri ta Manzon Allah (SAW) da iyalan gidansa (AS), galibin matakan da ake dauka don biyan bukatun wasu sun kasance ta hanyar hadin kai ta fuskar taimakon juna, wanda a lokuta da dama kuma ya kai ga sadaukarwa da sadaukarwa.
Mazhabar Musulunci ta dauki hadin kai a matsayin daya daga cikin abubuwan da suka wajaba na tunani na al'ada, kuma ta hanyar jaddada kyautatawa da gaugawar hadin kai da taimakon juna na muminai, ta gargade su da duk wani hadin kai a cikin munanan ayyuka da zai haifar da rashin daidaito da rashin adalci a cikin al'umma.