(idiomatic) Stop; wait; hold on. Used to interrupt speech or proceedings so that one can make a comment or query.

(literally) Only one second; a passage of time one-sixtieth of a minute in duration. / (idiomatic) A short period of time, typically anywhere from a few seconds to several minutes or more.

(idiomatic) Stop; wait. Used to indicate that the speaker wishes the previous speaker or the proceedings to stop so that he or she can comment on what has been said or has happened so far.

(informal) just a second

(humorous) Indicates the speaker has noticed an erection underneath the interlocutor's clothes.

Devoid of or without justice.

(Canada, US, vulgar, slang) A situation suddenly became much more dangerous or serious from the viewpoint of the speaker.

(law) An error at a trial which led to an unjust outcome, such as the conviction of a person for a crime they did not commit.

In the precise manner indicated. / Used other than figuratively or idiomatically: see just, so

Used to show that the truth or existence of one thing does not logically justify the truth or existence of another thing. / For no particular reason.