(grammar) The form of a verb used with the pronouns you (plural), y'all, you guys, etc., or their equivalents in other languages.

a stream formed by the confluence of two first order streams, or of a first order stream and a second order stream

The right of an airliner of one country to land in another country for technical reasons such as refueling and maintenance.

(idiomatic) To change one's opinion, or be uneasy about a previous decision.

(cricket) The first replacement new ball in an innings; in Test cricket, usually taken after 80 overs.

(databases) A stage in the normalization of a relational database in which it is in first normal form and every non-key attribute is dependent upon the entire primary key.

(forestry) A forest which has been harvested and is regrowing.

a burn, more severe than a first-degree burn, that blisters the skin

(usually in the plural) A measure of how many times an imaging or display device produces unique consecutive images (frames) in one second.

(law, archaic) The party to a legal dispute against whom a complaint was initially raised in a court.