(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.

The lowest rank of a commissioned army officer, below a lieutenant.

(US, idiomatic) After reconsidering; on further consideration.

(idiomatic) A mindset, skill, or type of behavior so ingrained through habit or practice that it seems natural, automatic, or without a basis in conscious thought.

Alternative spelling of secondhand

Alternative spelling of second-guess