overmaster verb trans. [ǝʊvǝ'mɑ:stǝ] ME.
[from OVER- + MASTER verb.]
1. Master completely; overcome, conquer, overpower, (esp. a feeling, force, etc.). Chiefly as overmastering ppl adjective. ME.
■ Saki He was possessed by an overmastering desire to keep the dish.
■ J. Buchan The place had an overmastering silence.

2. Be master over; hold in one's power or possession. M16-M17.

■ overmasteringly adverb to an overmastering degree M19.

[TahlilGaran] English Dictionary ▲