দলত্যাগ, অক্ষমতা, কর্তব্যচু্যতি, বিদ্রোহ, স্বদলদ্রোহিতা
(1) Withdrawing support or help despite allegiance or responsibility.
(2) The state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes.
(3) The state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes).
(4) Abandonment.
(1) His defection from the Labour Party
(2) His defection from the Republican Party
desertion
renunciation
Joining