Learner's definition of INSTRUCTION
1 a : a statement that describes how to do something — usually plural
b : an order or command — usually plural
Our teacher gave us instructions for building the model. = Our teacher gave us instructions on how to build the model.
The manual provides complete/detailed instructions [=directions] for installing the software.
an instruction manual
We had instructions not to admit anyone.
I gave you explicit instructions to be here by six o'clock.
Don't you know how to follow instructions? [=directions]
I did everything according to your instructions.
2 [noncount] : the action or process of teaching : the act of instructing someone — often + in 3 [count], computers : a set of letters, numbers, etc., that tells a computer to do something