Definition of cross my heart
- I'll clean my room tomorrow—cross my heart.
: a structure consisting of an upright with a transverse beam used especially by the ancient Romans for execution
: the cross on which Jesus was crucified
: to lie or be situated across
: to make the sign of the cross upon or over
: lying across or athwart
: moving across
: running counter : opposite
: not parallel : crisscross, crosswise
: of or relating to me or myself especially as possessor, agent, object of an action, or familiar person
: muscle : muscle and
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