Noun

(en noun)

force, vigor, energy

a strong wind.

the force of the wind; rush, impetus, momentum, driving force

a thrust or push

a whirring noise

:* {{quote-book, year=1916

, year_published=2009 , edition=Reprint , editor= , author=Colonel J.A. Currie , title=The Red Watch, With the First Canadian Division in Flanders , chapter=XVII The Battle of Neuve Chapelle citation , genre= , publisher=Project Gutenberg , isbn= , page= , passage=When the British Tommies heard the "birr " of the five-inch Canadian shells they all asked whose they were. }}

a strong trilling pronunciation

:* {{quote-news, date=2011-04-24

, first= , last= , author=Kevin McKenna , authorlink= , coauthors= , title=Labour needs to challenge Alex Salmond – and quickly , newspaper=The Guardian , city= , publisher= , quotee= citation , page= , passage=Gray possesses an unfortunate East of Scotland birr that suggests a 21-year-old student interviewing for his first job. }}

Noun

(en noun)

The currency of Ethiopia, divided into 100 santims

Noun

(biros)

A BIRO brand ballpoint pen.

* 1993 , , 2008, unnumbered page,

Frank's Biro taps delicately at the topmost of the little yellow notes.

(by extension, UK, AU, NZ) Any ballpoint pen.

* 2007 , , The Anatomy of Wings , page 250,

Massimo's finger was poised above red on his multi-coloured biro like a kangaroo frozen in headlights.

(by extension) Ink from a ballpoint pen.

* 2011 , Shannon Lush, Jennifer Fleming, Completely Spotless , unnumbered page,

‘My very creative 2-year-old son used my good friend?s white polyester Roman blinds as a canvas,’ says Jacqui. They?re now covered in blue biro'. And although my friend isn?t too bothered by the ' biro , I am! Can you help??