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coincide vs dissipate

Coincide and dissipate are opposites in direction and outcome. Coincide is for two independent things to occupy the same point or happen at the same time. Dissipate is to scatter and gradually fade until nothing is left. Coincide brings two things to one shared point; dissipate thins a thing out until it vanishes.

Quick rule
two independent things share the same point or time→coincide
scatter and fade until nothing is left→dissipate
coincide

Fig. 1a — coincide.

/ˌkoʊɪnˈsaɪd//ˌkəʊɪnˈsaɪd/·verb
vs
dissipate

Fig. 1b — dissipate.

/ˈdɪsɪpeɪt//ˈdɪsɪpeɪt/·verb

One brings two things to a single point; the other lets a thing fade to nothing. Coincide, from co- 'together' and incidere 'to fall upon', means two things fall on the same spot or moment. Dissipate, from dis- 'apart' and supare 'to throw', thins something out until it is gone. Two events coincide at one moment; a mood dissipates and is gone. One converges on a shared point; the other fades away everywhere.

01What each means

coincide

To coincide is to occupy the same point — in time, space, or opinion — while belonging to different paths. From the Latin co-incidere, 'to fall upon together'. Festivals coincide with full moons; an interview coincides with a strike; two rivals' interests briefly coincide. The word insists on independence: neither schedule bent for the other, which is exactly what makes coincidence feel like fate — two orbits, each obeying only itself, agreeing on a single moment.

dissipate

To dissipate is to scatter and fade until nothing is left: fog dissipates as the sun climbs, tension dissipates after an argument, energy dissipates as heat. Unlike disperse, where a thing spreads out but still exists somewhere, what dissipates loses itself completely — it thins into the air and is gone. From the Latin dissipare, 'to scatter', it can also mean to squander: a fortune may dissipate as surely as mist. Either way, something concentrated ends as nothing.

02At a glance
coincidedissipate
Meaningoccupy the same point or timescatter and fade away to nothing
Directionto one shared pointoutward, thinning to nothing
The resulttwo things meeting at a pointnothing left
Often withdates, events, lines, opinionsfog, heat, energy, tension
Nouncoincidencedissipation
ExampleThe dates coincide.The mist dissipated.
03How to remember

Ask whether two things meet at a point or a thing fades away. Coincide brings two things to the very same point or moment — two rings crossing at one spot. Dissipate thins a thing out until nothing remains — a fog lifting off the hills. If two things share a single point, they coincide; if a thing spreads out and fades to nothing, that is dissipate.

04In use

coincide

  • iHer visit happened to coincide with the festival.
  • iiThe two lines coincide at exactly one point.
  • iiiOur views on the matter largely coincide.

dissipate

  • iThe tension in the room dissipated once she laughed.
  • iiBy noon the fog had completely dissipated.
  • iiiHis early anger slowly dissipated over the evening.

Coincide brings two things to a single shared point; dissipate thins a thing out until it is gone. They oppose in direction and outcome — a meeting at a point versus a fading to nothing. Coincide's figurative sense (opinions coincide = agree) has no match in dissipate.

05Asked
What is the difference between coincide and dissipate?
Coincide is for two independent things to occupy the same point or happen at the same time, while dissipate is to scatter and gradually fade until nothing remains. Coincide brings two things to one shared point; dissipate thins a thing out until it vanishes. In the scenes above, two rings cross at a single shared point, whereas a bank of fog thins and lifts off the hills until the air is clear.
Are coincide and dissipate opposites?
In direction and outcome, yes: coincide brings two things to the very same point, while dissipate spreads a thing out until it is gone. One converges on a shared spot, the other fades to nothing. They are not an everyday pair, since they act on different things, but the contrast — meeting versus vanishing — is exact.
What does coincide mean when opinions coincide?
It means they agree — 'our views coincide' is a formal way of saying we think the same, while staying two separate views, like the rings meeting at one point in the scene above. Dissipate has no such sense; it means a thing fading to nothing. So coincide can note agreement at a point, while dissipate thins a thing away.
What does dissipate mean in physics?
To spread energy out until it can no longer do useful work — friction dissipates a car's motion as heat, which thins into the surroundings and cannot be gathered back. Coincide has no scientific sense of this kind; it means two things sharing a point. So the two rarely meet, but one converges while the other fades away.
What are the noun forms of coincide and dissipate?
Coincidence and dissipation. 'A coincidence' usually names a chance meeting of events at one time; 'dissipation' names a fading-away, with a physics sense (energy dissipation) and a moral one (a life of dissipation). The nouns keep the contrast: a meeting at a point versus a vanishing.
Which word fits two events on the same day?
Coincide. Two events on the same day coincide — they share a moment, like the rings meeting at one point in the scene above. Dissipate would mean a thing fading to nothing. The tell is direction: coincide brings things to one shared point, dissipate thins a thing away.
Which word fits tension fading from a room?
Dissipate. Tension dissipates when it thins away until nothing of it is left, as the fog does in the scene above. Coincide would mean two things meeting at a point. The tell is outcome: dissipate fades to nothing, coincide converges on a shared point.
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coincide — full entrydissipate — full entry← All antonyms