1 a : tending to overwhelm : overpowering
b : decisively important : dominant
2 : harshly and haughtily arrogant
synonyms see proud over·bear·ing·ly \-iŋ-lē\ adverb
Examples: the overbearing problem in our nation’s schools the doctor’s overbearing attitude is resented by nurses and patients alike.
First use: 1614
Synonyms: arch, big, capital, cardinal, central, chief, dominant, first, grand, great, greatest, highest, key, leading, main, master, number one (also No. 1), numero uno, foremost, overmastering, overriding, paramount, predominant, preeminent, premier, primal, primary, principal, prior, sovereign (also sovran), supreme.
Antonyms: last, least
Source: Merriam-Webster’s Dictionary online