adj.
done, made, or happening only once and not repeated: one-off tax deductible donations to charity n.
something done, made, or happening only once, not as part of a regular sequence: the meeting is a one-off
Oxford American Dictionary
adj.
done, made, or happening only once: a one-off benefit show n.
something done, made, or happening only once: the meeting is a one-off
Oxford Dictionary
ph.
the first to seize an opportunity
Oxford Dictionary
ph.
the first to seize an opportunity
Oxford Dictionary
ph.
isolate oneself from other people
Oxford American Dictionary
ph.
isolate oneself from other people
Oxford Dictionary
ph.
so as to be no longer standing
Oxford American Dictionary
ph.
out of one's mind; crazy
Oxford Dictionary