noun
plural -tions
[count] :something that joins or connects two or more things
[noncount] :the act of connecting two or more things or the state of being connected
[count] a situation in which two or more things have the same cause, origin, goal, etc.
a situation in which one thing causes another
[count] something that allows you to become connected to a system, network, etc., through a telephone, computer, or other device
a place where two parts or wires meet and touch
[count] :a train, bus, or airplane that you get onto after getting off another train, bus, or airplane as part of the same journey
[count] a relationship between people who are part of the same family, who do business together, etc.
a shared feeling of affection and understanding
[count] a powerful person who you know and who can help you - usually plural
b informal :a person who sells something illegal
in connection with
in relation to (something) :for reasons that relate to (something) - used especially in journalism
make a/the connection
to understand that there is a relationship between two or more things