having a pattern of small squares

a checked shirt

(of a bag) consigned to the care of the transport provider with whom one is travelling, especially at an airport

the airline offers two free checked bags

examine (something) in order to determine its accuracy, quality, or condition, or to detect the presence of something

customs officers have the right to check all luggage

a simple blood test to check foranaemia

stop or slow the progress of (something, typically something undesirable)

efforts were made to check the disease

(of a passenger) consign (baggage) to the care of the transport provider with whom they are travelling

I checked my bag and got my boarding pass

mark or click on (a box) in order to select a particular option on a form, questionnaire, etc.

users who want privacy should check the box that prevents your files from being shared

move a piece or pawn to a square where it attacks (the opposing king)

he moves his knight to check my king again

(in poker) choose not to make a bet when called upon, allowing another player to do so instead

(of a hound) pause to make sure of or regain a scent