Sub

Sub- is a prefix derived from Latin, meaning "under", "below", or "less than". The analogous Greek prefix is "hypo-". Antonym: supra.

As a word, sub may be an abbreviation for:

• Submarine
• Submarine sandwich
• Subroutine
• Subscriber
• Substitute, especially a substitute teacher
• Subtitle, especially in connection with anime films, and as opposed to dub
  • .sub, an extension used by several file formats for displaying subtitles in many video playback programs
• Submissive (BDSM)
• Subwoofer
• subscript, <sub></sub> is the HTML element used to format text as subscript.
• subeditor
• subcontractor
• Sub, a Finnish television channel formerly known as Subtv
• the substitute character in the C0 control code set

The acronym SUB may refer to:

• the Seafarers' Union of Burma
• the ticker symbol for Summit Bancorp of New Jersey on the New York Stock Exchange
• the IATA airport code for Juanda International Airport in Surabaya, Indonesia