plural of customer base

(law, historical) A service which is owed from time immemorial.

Provision of service to customers before, during and after a purchase.

plural of heir by custom

(law) One whose right to inherit as heir is determined by customary modes of descent, such as gavelkind.

(Ireland, historical) A custom that gave tenants of Ulster in Ireland a reasonable expectation of security of tenure as long as they paid their rent, and allowed them to sell the right to occupy their holding to another tenant acceptable to the landlord.

taking care of customers to ensure their satisfaction

(translation studies) In interpreting, member of an examination panel who can assess a candidate's performance in the target language with an unbiased viewpoint, i.e. independently of the original speech (either because they have not listened to it, or because they do not understand the source language).

Eggcorn of grow accustomed.

Synonym of consumer research