Definition of on second thoughtUS
- On second thought, I think I'll go after all.
: next to the first in place or time
: next to the first in value, excellence, or degree
: inferior, subordinate
: one that is number two in a series — see Table of Numbers
: one that is next after the first in rank, position, authority, or precedence
: one that assists or supports another
: the 60th part of a minute of angular measure
: the 60th part of a minute of time : 1/86,400 part of the mean solar day
: an instant of time : moment
: to give support or encouragement to : assist
: to support (a fighting person or group) in combat : bring up reinforcements for
: to support or assist in contention or debate
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