sec /sek/ BrE AmE noun
[ Date: 1800-1900 ; Origin: ⇨ ↑ second 2 ]
1 . a sec spoken informal a very short period of time
hang on a sec/hold on a sec/just a sec etc (=wait a short time)
‘Is Al there?’ ‘Hold on a sec, I’ll check.’
in a sec
I’ll be with you in a sec.
2 . the written abbreviation of second :
Journey time: 25 mins 14 secs.