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in‧struc‧tion S3 W2

1 the written information that tells you how to do or use something [↪ directions]: ! Do not say 'instructions how to do something' or 'instructions to do something'. Say instructions on how to do something.
instructions
[plural]DT2 [countable usually plural] a statement telling someone what they must do [↪ orders]
on somebody's instructions (=having been told by someone to do something)
On the landlord's instructions, the barmaid refused to serve him.
On the landlord's instructions, the barmaid refused to serve him. be under instruction to do something (=have been told to do something)
The police were under instruction to fire if necessary.
The police were under instruction to fire if necessary.3 [uncountable] formal teaching that you are given in a particular skill or subject :
religious instruction
driving instruction
religious instruction
driving instruction