Definition:-

• Of the very darkest colour owing to the absence of or complete absorption of light; the opposite of white. (adjective)
• Belonging to or denoting any human group having dark-coloured skin, especially of African or Australian Aboriginal ancestry.Relating to black people. (adjective)
• Characterized by tragic or disastrous events; causing despair or pessimism. (adjective)
• Denoting a covert military procedure. (adjective)
• (of goods or work) not to be handled or undertaken by trade union members, especially so as to express support for an industrial dispute elsewhere. (adjective)
• Black colour or pigment. (noun)
• A member of a dark-skinned people, especially one of African or Australian Aboriginal ancestry. (noun)
• The situation of not owing money to a bank or of making a profit in a business operation. (noun)
• Blackcurrant cordial. (noun)
• Make (something) black; blacken. (verb)
• Refuse to handle (goods), undertake (work), or have dealings with (a person or business) as a way of taking industrial action. (verb)