我想你要比较的是idea和meaning

　　idea更注重自我的主意

　　而

　　meaning注重本身的含义,或是隐含意

　　更详细的含义

　　看下面longman的解释

　　i‧dea/aɪˈdɪə/

　　1

　　▶PLAN/SUGGESTION◀

　　[countable]aplanorsuggestionforapossiblecourseofaction,especiallyonethatyouthinkofsuddenly

　　I'vehadanidea.Whydon'twewalkintotown?Shegottheideafromanarticleinafashionmagazine.Whatgaveyoutheideaofusingamaleactorforthepart?Mike'salwaysgoodatcomingupwithnewideas.Itwasmywife'sideatomovehouse.

　　ideafor

　　Theideaforthebookcamefromanoldwarmovie.

　　Whatagreatidea!Iknewitwasabadideatoleavehimonhisown.Shewasalwaysveryenthusiasticandburstingwithideas.anexchangeofideasbetweenacademicandbusinesscommunitiesLatelyI'vebeentoyingwiththeideaofgoingbacktoschool.

　　2

　　▶KNOWLEDGE◀

　　[uncountableandcountable]ageneralunderstandingofsomething,basedonsomeknowledgeaboutit

　　Couldyougivemeanideaofhowbadhisinjuriesare?Youmusthavesomeidea(=haveatleastalittleknowledge)ofwhathappenedtothemoney.Don'tworryifyoudon'tunderstanditrightnow-you’llgettheidea(=begintounderstandorbeabletodosomething).havenoidea/nothaveanyideaShedoesn'thaveanyideawherethey'vegone.ageneral/roughidea(=anotveryexactidea)Canyougivemearoughideaofhowmuchtherepairswillcost?nothavethefaintest/slightest/foggiestideaspokenIdon’thavethefaintestideawhattogetRachelforherbirthday.

　　3

　　▶AIM/INTENTION◀

　　[uncountableandcountable]theaim,intention,orpurposeofdoingsomething

　　Theideaistoteachchildrentosavemoney.

　　ideaof/behind

　　Theideabehindtheoutingistoencourageemployeestogettoknoweachother.

　　TheywantedMiketogotolawschool,buthehadotherideas(=haddifferentplans).

　　4

　　▶HOWYOUIMAGINESOMETHINGTOBE◀

　　[uncountableandcountable]animageinyourmindofwhatsomethingislikeorshouldbelike

　　ideaof

　　Chefsdifferintheirideaofwhatmakesagooddessert.

　　IonlyhaveavagueideaofthekindofworkI'llbedoing.Ithelpsifyouhaveaclearideaofwhatyouwant.notmyideaofsomethingChocolatemilkandapieceofcakeisnotmyideaofdinner.Theveryideaofkissinghimmadeherfeelphysicallysick.

　　5

　　▶BELIEF/OPINION◀

　　[countableusuallyplural]someone'sopinionorbeliefaboutsomething

　　ideaabout

　　Shehadsomeratherunusualideasaboutraisingchildren.

　　wheredidyougetthatidea?(=usedtosaythatwhatsomeonethinksiscompletelywrong)No,I'mnotseeingJane.Wheredidyougetthatidea?

　　6

　　▶PRINCIPLE◀

　　[countable]aprincipleorbeliefabouthowsomethingisorshouldbe

　　ideaof

　　Thewholeideaofdemocracywassomethingstrangeandnewtomostpeople.

　　ideathat

　　It'sbasedontheideathatallpeoplearecreatedequal.

　　7

　　haveanidea(that)

　　tobefairlysurethatsomethingistrue,withoutbeingcompletelysure

　　I'mnotsurewheremynecklaceis,butIhaveaprettygoodideawhotookit.