Antonyms of adj spacious

2 senses of spacious

Sense 1
broad, spacious, wide -- (very large in expanse or scope; "a broad lawn"; "the wide plains"; "a spacious view"; "spacious skies")

INDIRECT (VIA large, big) -> small, little -- (limited or below average in number or quantity or magnitude or extent; "a little dining room"; "a little house"; "a small car"; "a little (or small) group")
INDIRECT (VIA large, big) -> small, little -- (limited or below average in number or quantity or magnitude or extent; "a little dining room"; "a little house"; "a small car"; "a little (or small) group")

Sense 2
roomy, spacious -- ((of buildings and rooms) having ample space; "a roomy but sparsely furnished apartment"; "a spacious ballroom")

INDIRECT (VIA commodious) -> incommodious -- (uncomfortably or inconveniently small; "incommodious hotel accommodations")

Similarity of adj spacious

2 senses of spacious

Sense 1
broad, spacious, wide -- (very large in expanse or scope; "a broad lawn"; "the wide plains"; "a spacious view"; "spacious skies")
       => large (vs. small), big (vs. little) -- (above average in size or number or quantity or magnitude or extent; "a large city"; "set out for the big city"; "a large sum"; "a big (or large) barn"; "a large family"; "big businesses"; "a big expenditure"; "a large number of newspapers"; "a big group of scientists"; "large areas of the world")

Sense 2
roomy, spacious -- ((of buildings and rooms) having ample space; "a roomy but sparsely furnished apartment"; "a spacious ballroom")
       => commodious (vs. incommodious), convenient -- (large and roomy (`convenient' is archaic in this sense); "a commodious harbor"; "a commodious building suitable for conventions")