buckle in

buckle someone in

to attach someone securely with a vehicle's seat belts. (This includes airplane seat belts.) Don't forget to buckle the children in. Did you buckle in the children?
See also: buckle
References in periodicals archive ?
It fits in tight spaces and between booster seats and also fits securely so seats can be folded down without removing it and does not alter the buckle in any way.
However, the letter was termed "terribly one-sided" by Bishop Donald Harvey of Eastern Newfoundland and Labrador, who responded, also in an open letter, that he intended to continue to support Bishop Buckle in his actions in New Westminster.
A scab is a worst-case buckle in which metal runs behind a shell crack.
It's a beautiful land with very few people and an interesting history," said Bishop Buckle in an interview.
We decided to improve our current buckle in order to reassure parents that they can use the Traveler 700 with complete confidence.