English definition of “every”
EACH › each one of a group of people or things: He knows the name of every child in the school. Every one of the paintings was a fake.
HOW OFTEN › used to show that something is repeated regularly: He goes to Spain every summer. Take the antibiotics every four hours.
POSSIBLE › as much as is possible: I'd like to wish you every success in your new job. Every effort is being made to rectify the problem.
every now and then/every so often › sometimes, but not often: We still meet up every now and then.
one in every five/ten, etc › used to show how many people or things in a group are affected by or involved in something