Passing reference or indirect mention.

Roget 516: meaning; signification, significance; sense, expression; import, purport; force; drift, tenor, spirit, bearing, coloring; scope.    [important part of the meaning] substance; gist, essence, marrow, spirit etc. 5.    matter; subject, subject matter; argument, text, sum and substance.    general meaning, broad meaning, substantial meaning, colloquial meaning, literal meaning, plain meaning, simple meaning, natural meaning, unstrained meaning, true meaning, etc. (exact) 494 honest meaning, etc. 543 prima facie meaning [Lat.]; etc. (manifest) 525.    letter of the law.    literally; after acceptation.    synonym; implication, allusion etc. (latency) 526; suggestion etc. (information) 527; figure of speech etc. 521; acceptation etc. (interpretation) 522.    ... show more

Roget 521: figure of speech; facon de parler [Fr.], way of speaking, colloquialism.    phrase etc. 566; figure, trope, metaphor, enallage^†, catachresis^†; metonymy [Gramm.], synecdoche [Sem.]; autonomasia^†, irony, figurativeness etc. adj.; image, imagery; metalepsis^†, type, anagoge^†, simile, personification, prosopopoeia^†, allegory, apologue^†, parable, fable; allusion, adumbration; application.    exaggeration, hyperbole etc. 549.    association, association of ideas (analogy) 514.1 ... show more

Roget 526: latency, inexpression^†; hidden meaning, occult meaning; occultness, mystery, cabala^†, anagoge^†; silence etc. (taciturnity) 585; concealment etc. 528; more than meets the eye, more than meets the ear; Delphic oracle; le dessous des cartes [Fr.], undercurrent.    implication, logical implication; logical consequence; entailment.    allusion, insinuation; innuendo etc. 527; adumbration; something rotten in the state of Denmark" [Hamlet]. snake in the grass etc. (pitfall) 667; secret etc. 533.    darkness, invisibility, imperceptibility.    ... show more

Dutch: allusie, toespeling, zinspeling
Polish: aluzja