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v. grinned, grin·ning, grins
To smile broadly, often baring the teeth, as in amusement, glee, embarrassment, or other strong emotion.
To express with a grin: I grinned my approval.
1. The act of grinning.
2. The facial expression produced by grinning.

[Middle English grennen, to grimace, from Old English grennian.]

grin′ner n.
grin′ning·ly adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.grinner - a person who grins
individual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"
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References in periodicals archive ?
Lennon's a winner grinner Former Celtic boss Neil Lennon wore a broad smile after watching his Bolton side make it two wins from three games in his charge.
The Grinner promptly took victory in the second contest however with Biaggi claiming fifth spot - the lowest he could finish to take the title - victory went to Sykes' rival.
The ute is as Australian as Vegemite or Kylie,' declares a ringer (cowboy) called Grinner, who is holed up at the Burke and Wills Roadhouse in Queensland for a season of mustering.
Goodfellas pizza company is looking for the 'smiliest' place in the UK and has launched the Winner Grinner competition.
Trooper Finney managed to get out of his driving position and was on the way towards cover when he noticed that his vehicle's grinner was trapped in the turret.
Granddaddy Henry Grinner said no matter where you go in the world and no matter what you see, somewhere up in there you will find a negro.
Michael Grinner of GIS recently announced that his company is using Tango Enterprise 3.
That leaves Sykes with a mountain to climb at the season finale at Magny Cours on October 7 with just 50 points available however the Grinner refused to be downcast.
If the guiler, the greaser and the grinner are setting the agenda for this country then it is little wonder even minnows such as Mrs Jones are out for revenge.
Not forgetting, of course, rictus grinner Dr Dawn Harper (right) banging on about her favourite subject.