Noun

(en noun)

(computing) Application programming interface.

(pharmacology) Active pharmaceutical ingredient.

Noun

(en noun)

(senseid)An entrance capable of being blocked by use of a gate.

*{{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess) , chapter=1 citation , passage=The original family who had begun to build a palace to rival Nonesuch had died out before they had put up little more than the gateway , […].}}

Any point that represents the beginning of a transition from one place or phase to another.

A point at which freight moving from one territory to another is interchanged between transportation lines.

(digital communications) In wireless internet, an access point with additional software capabilities such as providing NAT and DHCP, which may also provide VPN support, roaming, firewalls, various levels of security, etc.