the lawful arrest or detention of a person to prevent his effecting an unauthorised entry into the country or of a person against whom action is being taken with a view to deportation or extradition.
duine a ghabháil nó a choinneáil go dleathach chun é a chosc ó theacht isteach gan údarás sa tír, nó duine a ghabháil nó a choinneáil amhlaidh a bhfuil beart á thionscnamh ina choinne d'fhonn é d'ionarbadh nó d'eiseachadadh.