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thick

THIK/θɪk/

Formsthicker, thickest

19 meanings of thick

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  1. 1
    not thinadjective
    Having a relatively large distance between opposite surfaces or sides, or measuring a specified distance between them.

    A thick slab of oak formed the tabletop.

    Cut the bread into thicker slices for the sandwiches.

    UsageWith a measurement, it follows the number: two inches thick, a meter thick.

    Similarchunky, fat

    Oppositethin, slim

    Note

    Old English þicce already meant both "thick" and "dense", and that pairing runs through the later meanings: the crowded sense and the sense for gravy and oil are close kin of this one. Thickness is taken across the smallest dimension, so a plank is thick from face to face and wide from edge to edge.

    Checked 2 Nov 2026 · 1 fact

  2. 2
    not wateryadjective
    Having a viscous consistency, so that it flows slowly rather than running freely.

    The gravy turned thick after a few minutes on the stove.

    Cold weather makes motor oil thicker and harder to pump.

    Similarviscous, gooey, syrupy, stiff, treacly

    Oppositerunny, free-flowing

  3. 3
    denseadjective
    Densely crowded or packed together, with the individual parts close to one another.

    Thick underbrush slowed the hikers to a crawl.

    The crowd grew thicker as the parade approached.

    Similarcrowded, dense, packed, tight, compact

    Oppositesparse

  4. 4
    opaqueadjective
    Impenetrable to sight; too dense for the eye to see through.

    Thick mist hung over the harbor until noon.

    The divers lost sight of each other in the thick, silty water.

    UsageCommon with fog, mist and smoke: thick fog.

    Similardense, opaque

    Oppositetransparent, thin, translucent

  5. 5
    busiest partnoununcountable
    The most active, intense, or densest part of something, such as a battle, a crowd, or a busy stretch of work.

    Reporters pushed into the thick of the protest to reach the organizers.

    She does her best work in the thick of campaign season.

    UsageUsually in in the thick of: in the thick of battle, in the thick of it.

    Similarmidst, heart, middle, center

    Oppositefringe, periphery, edge

  6. 6
    intenseadjective
    Deep, intense, or profound in degree or effect.

    A thick gloom settled over the camp after the defeat.

    The tension in the courtroom was thick enough to touch.

    Similargreat, extreme

    Oppositeslight, faint

  7. 7
    lots ofadjective
    Abounding in number; occurring or gathered in great quantity.

    The woods were thick with deer that fall.

    The harbor was thick with sailboats during the regatta.

    UsageUsually thick with something: the room was thick with reporters.

    Similarabundant, plentiful, numerous, teeming, copious

    Oppositescarce, scant, slight

Practice

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Origin

Proto-Indo-European *tégus ("thick") led to Proto-Germanic *þekuz and then to Old English þicce ("thick, dense"), which became Middle English thikke. German dick, Dutch dik and Swedish tjock are related, and so is Welsh tew.