(grammar) The form of a verb used when the subject of a sentence is the audience. In English, the second person is used with the pronouns thou and you. In many languages the singular, applying to one person, and plural, applying to several people, are distinct.

A grandchild of a grandparent's sibling. / A relative who has with the other person only two great-grandparents in common, but where the parents and grandparents are different.

A violinist who is assigned to play the second violin part.

The second violin part in an orchestral score, generally a harmony to the first violin's melody and generally less technically demanding.

(music) A fiddle part in harmony to the first fiddle. / (music) The person playing second fiddle. / (idiomatic) A sidekick or subordinate, or the role of such a person.

(mathematics, logic) Denoting the second in a numerical sequence of models, languages, relationships, forms of logical discourse etc. / Of secondary importance.

A second portion of the same thing, usually of food; seconds; refill.

Used other than figuratively or idiomatically: see split, second. / Alternative form of split-second

The nick of time; a brief moment.

plural of second helping