withdraw from commercial or social relations with (a country, organization, or person) as a punishment or protest.

we will boycott all banks which take part in the loans scheme

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a punitive ban on relations with other bodies, cooperation with a policy, or the handling of goods.

a boycott of the negotiations

ban,bar,veto,embargo,moratorium,prohibition,proscription,interdict,injunction,sanction,restriction,barrier,avoidance,shunning,rejection,refusal,thumbs down,red light,knock-back