Affix, v. t. [imp. & p. p. Affixed; p. pr. & vb. n. Affixing.]
Etymology: [LL. affixare, L. affixus, p. p. of affigere to fasten to; ad + figere to fasten: cf. OE. affichen, F. afficher, ultimately fr. L. affigere. See Fix.]
1. To subjoin, annex, or add at the close or end; to append to; to fix to any part of; as, to affix a syllable to a word; to affix a seal to an instrument; to affix one's name to a writing.
2. To fix or fasten in any way; to attach physically. Should they [caterpillars] affix them to the leaves of a plant improper for their food. Ray.
3. To attach, unite, or connect with; as, names affixed to ideas, or ideas affixed to things; to affix a stigma to a person; to affix ridicule or blame to any one.
4. To fix or fasten figuratively; -- with on or upon; as, eyes affixed upon the ground. [Obs.] Spenser.
1 more senses
Syn. -- To attach; subjoin; connect; annex; unite.
1 other Webster entry under this spelling
Affix, n.; pl. Affixes.
That which is affixed; an appendage; esp. one or more letters or syllables added at the end of a word; a suffix; a postfix.
Shades of meaning
Fernald has no entry of its own for affix; he lists it under add.
Where he writes about it:
We may enlarge a house, a farm, or an empire, extend influence or dominion, augment riches, power or influence, attach or annex a building to one that it adjoins or papers to the document they refer to, annex a clause or a codicil, affix a seal or a signature, annex a territory, attach a condition to a promise. — from add