a sixtieth of a minute of time, which as the SI unit of time is defined in terms of the natural periodicity of the radiation of a caesium-133 atom
a sixtieth of a minute of angular distance
transfer (a military officer or other official or worker) temporarily to other employment or another position
I was seconded to a public relations unit
formally support or endorse (a nomination or resolution or its proposer) as a necessary preliminary to adoption or further discussion
Bridgeman seconded Maxwell's motion calling for the reform