There are 2 definitions of flicker in English:

flicker1

Syllabification: flick·er
Pronunciation: /ˈflikər
 
/

verb

[no object]
1(Of light or a source of light) shine unsteadily; vary rapidly in brightness: the interior lights flickered and came on
More example sentences
  • There were no bright lights flickering on and off giving you a headache.
  • Without any warning, the lights flickered then turned on brightly.
  • A bright light flickered from the other side of the window and firecrackers popped all over the room.
Synonyms
1.1(Of a flame) burn fitfully, alternately flaring up and dying down: the candle flickered again (as adjective flickering) the flickering flames of the fire
More example sentences
  • Small dying flames flickered on his body, and he did nothing to remove them, as if the flames were merely a mirage.
  • Nick's eyes burned, small flames flickering within his pupils.
  • The flame flickered and then burnt fiercely, casting a warm yellow light over the small study.
1.2 [with adverbial of place] (Of a feeling or emotion) be experienced or show itself briefly and faintly, especially in someone’s eyes: amusement flickered briefly in his eyes
More example sentences
  • An undefined emotion flickered over his features briefly before they settled back into a blank gaze.
  • Those gathered at the gates of Longannet witnessed the despair of many, and the anger flickering briefly across some faces.
  • Emotions briefly flickered across his blue eyes as they gazed into hers, wide and astonished.
2Make small, quick movements; flutter rapidly: her eyelids flickered [with complement]: the injured killer’s eyes flickered open
More example sentences
  • My eyelids flickered open and revealed Jack on a chair next to my bed.
  • Saka's eyelids flickered, then popped open to reveal cerulean eyes with no pupils that Ayane could see.
  • After several moments, Karae's eyelids flickered and opened a tiny bit.
Synonyms
flutter, quiver, tremble, shiver, shudder, spasm, jerk, twitch
2.1 [with adverbial of direction] (Of someone’s eyes) move quickly in a particular direction in order to look at something: her alert hazel eyes flickered around the room
More example sentences
  • She joined in a conversation, her eyes flickering in the direction of the room doors.
  • His eyes flickered in her direction, then focused back on Malloy.
  • Her iridescently colored eyes flickered in the direction of the voice, soon followed by a warm smile as she looked to Raek.

noun

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1An unsteady movement of a flame or light that causes rapid variations in brightness: the flicker of a candle flame caught our eyes
More example sentences
  • The bright flicker of the candles lit the room and colored their cheeks as they stood before the kingdom's legion of Royal advisors.
  • Abruptly, the strange, unsteady flickers of light coalesced, solidifying as a small spark of flame grew within their depths.
  • They stayed late beside its glow, a flicker of light barely visible to us through the trees.
1.1Fluctuations in the brightness of a movie or television image such as occur when the number of frames per second is too small or the refresh rate too low for persistence of vision.
More example sentences
  • In these films, even video flicker becomes substance.
  • You get a smoother image with less flicker and scan lines are hardly noticeable.
  • Movies do something similar through lighting, framing and the subliminal flicker of film itself.
2A tiny movement: then a flicker of movement caught his eye
More example sentences
  • He caught a flicker of movement off to his right and vaguely heard the soft sounds of a small stream.
  • She thought she caught a flicker of movement out of the corner of her eye and turned to peer intently that way.
  • She kept low and watched the wagons disappear, but a flicker of movement caught her eye and she turned her head in time to see a red spider logo on the back of a jacket.
2.1A brief feeling or indication of emotion: a flicker of a smile passed across her face she felt a flicker of alarm
More example sentences
  • They are not merely unthinking savages: even in Goethe we have the faintest flicker of humanity.
  • I see her in every beautiful woman, in every danger that threatens to overtake me, in every heartbeat, every flicker of emotion.
  • Bam was close to me again and there was a faint flicker of hope.

Origin

Old English flicorian, flycerian 'to flutter', probably of Germanic origin and related to Low German flickern and Dutch flikkeren.

Phrasal verbs

flicker out

(Of a flame or light) die away and go out after a series of flickers.
More example sentences
  • She's already asleep by the time the light flickers out and leaves a pale, greenish afterglow.
  • She vividly recalled wading through the rapidly filling hallways, the lights flickering out, water rushing through a door, overtaking a man and his young son.
  • As she left, the lights started flickering out in the video game area, and the persistent whirring of the lane polishers shuddered to a halt.
(Of a feeling) die away and finally disappear: the swift burst of curiosity and eagerness flickered out

Definition of flicker in:

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Word of the day hubris
Pronunciation: ˈ(h)yo͞obris
noun
excessive pride or self-confidence

There are 2 definitions of flicker in English:

flicker2

Syllabification: flick·er
Pronunciation: /ˈflikər
 
/

noun

An American woodpecker that often feeds on ants on the ground.
  • Genus Colaptes, family Picidae: several species, in particular the common flicker (C. auratus), occurring in two forms that are distinguished by the underside of the tail and wings, which may be yellow (yellow-shafted flicker) or salmon red (red-shafted flicker)
More example sentences
  • Woodpeckers, flickers, chickadees and nuthatches are among the many species that benefit from it.
  • Unlike most woodpeckers, flickers spend a lot of time on the ground probing for ants.
  • The preserve, wild with birdsong, was thick with robins, flickers, grackles, blackbirds, catbirds, and doves.

Origin

early 19th century: imitative of its call.

Definition of flicker in: