- Also called: trimmer joist a beam in a floor or roof structure attached to truncated joists in order to leave an opening for a staircase, chimney, etc
- a machine for trimming timber
- Also called: trimming capacitor a variable capacitor of small capacitance used for making fine adjustments, etc
- a person who alters his or her opinions on the grounds of expediency
- a person who fits out motor vehicles
WordReference Random House Learner's Dictionary of American English © 2026
trim /trɪm/USA pronunciation
v., trimmed, trim•ming, n., adj., trim•mer, trim•mest, adv.
v. [~ + object]
n.
adj.
adv.
trim•mer, n. [countable]
trim•ness, n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026v. [~ + object]
- to put into a neat condition by clipping, paring, etc.:to trim a hedge.
- to remove (something unnecessary) by or as if by cutting:to trim those loose threads.
- to cut down;
reduce;
lower:to trim the sales force. - Nautical, Naval Termsto adjust (the sails or yards of a ship) with attention to the direction of the wind and the course of the ship.
- to adorn with ornaments;
esp., to decorate a store window:to trim the windows for Christmas.
n.
- [uncountable] the condition, order, or fitness of a person or thing for action, etc.
- Nautical, Naval Terms[countable* usually singular] the adjustment of sails, etc., with reference to wind direction and the course of the ship.
- [uncountable] material used for decoration.
- a trimming by cutting, clipping, or the like:[countable]He didn't want a full haircut, just a (quick) trim.
adj.
- neat or smart in appearance:trim lawns.
- (of a person) in excellent physical condition:Swimming is a good way to keep trim.
- slim;
lean:a trim figure.
adv.
- in a trim manner;
trimly.
trim•mer, n. [countable]
trim•ness, n. [uncountable]
trim•mer1
(trim′ər),USA pronunciation n.
trim•mer2 (trim′ər),USA pronunciation adj.
WordReference Random House Unabridged Dictionary of American English © 2026- a person or thing that trims.
- a tool or machine for trimming, clipping, paring, or pruning.
- a machine for trimming lumber.
- [Building Trades.]
- a joist or rafter supporting one of the ends of a header at the edge of a wellhole.
- a wall tile or floor tile for finishing an edge or angle.
- an apparatus for stowing, arranging, or shifting cargo, coal, or the like.
- a person who has no firm position, opinion, or policy, esp. in politics.
- a person who is committed to no particular political party, adapting to one side or another as expediency may dictate.
- trim + -er1 1510–20
trim•mer2 (trim′ər),USA pronunciation adj.
- comparative of trim.
trim (trim),USA pronunciation
v., trimmed, trim•ming, n., adj., trim•mer, trim•mest, adv.
v.t.
v.i.
n.
adj.
adv.
trim ′ly, adv.
trim ′ness, n.
v.t.
- to put into a neat or orderly condition by clipping, paring, pruning, etc.:to trim a hedge.
- to remove (something superfluous or dispensable) by or as if by cutting (often fol. by off):to trim off loose threads from a ragged edge.
- to cut down, as to required size or shape:trim a budget; trim a piece of wood.
- [Aeron.]to level off (an airship or airplane) in flight.
- [Naut.]
- to distribute the load of (a ship) so that it sits well in the water.
- to stow or arrange, as cargo.
- to adjust (the sails or yards) with reference to the direction of the wind and the course of the ship.
- to decorate or adorn with ornaments or embellishments:to trim a dress with fur.
- to arrange goods in (a store window, showcase, etc.) as a display.
- to prepare or adjust (a lamp, fire, etc.) for proper burning.
- [Informal.]
- to rebuke or reprove.
- to beat or thrash.
- to defeat.
- to dress or array (often fol. by up).
v.i.
- [Naut.]
- to assume a particular position or trim in the water, as a vessel.
- to adjust the sails or yards with reference to the direction of the wind and the course of the ship.
- to pursue a neutral or cautious policy between parties.
- to accommodate one's views to the prevailing opinion for reasons of expediency.
- trim one's sails. See sail (def. 11).
n.
- the condition, order, or fitness of a person or thing for action, work, use, etc.
- [Naut.]
- the set of a ship in the water, esp. the most advantageous one.
- the condition of a ship with reference to its fitness for sailing.
- the adjustment of sails, rigging, etc., with reference to wind direction and the course of the ship.
- the condition of a submarine as regards buoyancy.
- a person's dress, adornment, or appearance.
- material used for decoration or embellishment;
decorative trimming. - decoration of a store window for the display of merchandise;
window dressing. - a trimming by cutting, clipping, or the like.
- a haircut that restores the previous cut to neatness without changing the hair style.
- something that is cut off or eliminated.
- [Aeron.]the attitude of an airplane with respect to all three axes, at which balance occurs in forward flight under no controls.
- [Building Trades.]finished woodwork or the like used to decorate or border openings or wall surfaces, as cornices, baseboards, or moldings.
- [Auto.]
- the upholstery, knobs, handles, and other equipment inside a motor car.
- ornamentation on the exterior of an automobile, esp. in metal or a contrasting color.
adj.
- pleasingly neat or smart in appearance:trim lawns.
- in good condition or order.
- (of a person) in excellent physical condition:Swimming is a good way to keep trim.
- slim;
lean. - [Obs.]good, excellent, or fine.
adv.
- trimly.
- bef. 900; probably continuing Old English trymman, trymian to strengthen, prepare (not recorded in Middle English), derivative of trum strong, active; akin to Irish dron strong, Greek drȳmós coppice, Latin dūrus hard. See tree
trim ′ness, n.
- 1. shear, shave, cut, lop. 6. deck, bedeck, ornament, embellish, garnish. 18. adornment, garnish. 26. compact, trig, spruce.
Collins Concise English Dictionary © HarperCollins Publishers::
trimmer /ˈtrɪmə/ n