1firm 
/ˈfɚm/ adjective
firm·er; firm·est /ˈfɚm/ adjective 1 : fairly hard or solid : not soft
▪ firm flesh ▪ firm muscles ▪ a firm mattress ▪ a firm stomach ▪ a firm cheese 2 : set, placed, or attached in a way that is not easily moved
▪ a firm base/foundation — often used figuratively ▪ He believes that his argument is on firm ground/footing. [=that he has good support, evidence, etc., for his argument] 3 : not weak or uncertain
▪ a firm [=strong] handshake/grip ▪ She has a firm grasp of the basic principles. ▪ They insist on maintaining firm control over the project. ▪ He spoke to her in a soft but firm voice. ▪ The time has come for us to take a firm stand. ▪ The children need gentle but firm handling. 4 a : not likely to change or be changed
▪ We've made firm [=definite] plans for next weekend. ▪ a firm price/estimate/offer ▪ The dollar remained firm against the euro. ▪ reaching a firm conclusion/decision ▪ They haven't set a firm date for their wedding. ▪ The campaign has taken a firm hold on the public's imagination.
b : having or showing true and constant support for something or someone
▪ I'm a firm [=strong] believer in the value of exercise. = I have a firm belief in the value of exercise. ▪ Those two are firm friends. [=they are very close friends]
▪ firm flesh ▪ firm muscles ▪ a firm mattress ▪ a firm stomach ▪ a firm cheese
▪ a firm base/foundation — often used figuratively ▪ He believes that his argument is on firm ground/footing. [=that he has good support, evidence, etc., for his argument]
▪ a firm [=strong] handshake/grip ▪ She has a firm grasp of the basic principles. ▪ They insist on maintaining firm control over the project. ▪ He spoke to her in a soft but firm voice. ▪ The time has come for us to take a firm stand. ▪ The children need gentle but firm handling.
▪ We've made firm [=definite] plans for next weekend. ▪ a firm price/estimate/offer ▪ The dollar remained firm against the euro. ▪ reaching a firm conclusion/decision ▪ They haven't set a firm date for their wedding. ▪ The campaign has taken a firm hold on the public's imagination.
b : having or showing true and constant support for something or someone
▪ I'm a firm [=strong] believer in the value of exercise. = I have a firm belief in the value of exercise. ▪ Those two are firm friends. [=they are very close friends]
hold firm — see 1hold
stand firm — see 1stand
— firm·ly adverb
▪ They stood firmly [=steadfastly, solidly] behind their boss. ▪ He pulled the hat down firmly over his ears. ▪ I firmly [=strongly] believe in the value of exercise. ▪ She's got her feet firmly (planted) on the ground. [=she is a practical and sensible person]
▪ They stood firmly [=steadfastly, solidly] behind their boss. ▪ He pulled the hat down firmly over his ears. ▪ I firmly [=strongly] believe in the value of exercise. ▪ She's got her feet firmly (planted) on the ground. [=she is a practical and sensible person]
— firm·ness noun [noncount]
▪ the firmness of the mattress ▪ the firmness of the price/estimate/offer
▪ the firmness of the mattress ▪ the firmness of the price/estimate/offer
