PLT CROSSES HOLD SHORT LINE.

Narrative

THE CTLR CLRED ME TO; 'TAXI TO THE RWY AND HOLD SHORT; WAITING FOR IFR RELEASE.' I BELIEVE I READ THIS BACK EXACTLY AS HE SAID IT; BUT IN MY MIND I HEARD A DIFFERENT CLRNC; TAXI INTO POSITION AND HOLD FOR IFR RELEASE. CONTRIBUTING TO MY MISINTERPRETATION OF THE CLRNC WAS MY ANXIETY ABOUT GETTING OFF IN TIME TO AVOID A NIGHT LNDG AT THE DEST; AND THE DISTR OF HAVING MY FAMILY WITH ME IN THE ACFT. IT HAD BEEN A HURRIED AND STRESSFUL EVENT GETTING THE KIDS LOADED AND PREPPED FOR THE FLT AND I WAS READY TO GET OFF THE GND. THE DEP ARPT WAS WILEY POST (PWA); AND THE DEST ARPT WAS ZZZ. WHEN I RECEIVED WHAT I THOUGHT WAS THE 'TAXI INTO POSITION AND HOLD CLRNC' I READ IT BACK AND BEGAN TO MOVE. I MADE IT AS FAR AS THE EDGE OF THE RWY BEFORE THE CTLR REMINDED ME I HAD RECEIVED A 'HOLD SHORT CLRNC.' I EXPLAINED I THOUGHT IT WAS AN 'INTO POSITION AND HOLD' CLRNC. BY THE TIME I STOPPED I WAS WELL PAST THE HOLD SHORT LINE WITH THE NOSE OF THE ACFT ONTO THE ACTIVE. THE CTLR HAD TO DIVERT A LNDG ACFT TO RWY 35L; AND THIS MANEUVER WAS HANDLED EASILY BY THE OTHER ACFT. THE CTLR THEN CLRED ME FOR DEP. I ACCEPTED THE CLRNC; APOLOGIZED FOR CAUSING THE DIVERSION AND DEPED. ALL THIS WAS A VERY PROFESSIONAL AND EFFICIENT EXCHANGE; AND THE BEST WAS MADE OF THE MISUNDERSTANDING. AS I CONSIDERED WHAT HAD HAPPENED I BELIEVE MY MISUNDERSTANDING WAS BORN FROM THE COMMENT 'WAITING FOR IFR RELEASE.' I HAVE HEARD THIS PHRASE BEFORE; BUT ALWAYS IN THE CONTEXT FOR A 'TAXI INTO POSITION AND HOLD FOR IFR RELEASE' CLRNC. IN MY ANXIOUS STATE I TOOK THE WORDS SPOKEN BY THE CTLR AND REARRANGED THEM INTO WHAT I EXPECTED TO HEAR. WITHOUT THE EXTRA 'WAITING FOR IFR RELEASE' I WOULD HAVE ONLY HAD THE 'HOLD SHORT' CLRNC TO PROCESS. THE EXTRA INFO WAS OFFERED AS AND EXPLANATION FOR THE 'HOLD SHORT' CLRNC; BUT IT GAVE ME MORE INFO THAN I NEEDED AND CLUTTERED UP THE 'HOLD SHORT' PHRASEOLOGY.